How many problems does the 2023 HYUNDAI Ioniq 5 have?

The 2023 HYUNDAI Ioniq 5 currently has 295 owner-reported complaints according to NHTSA database. These complaints are organized by component to help identify common issues.

What are the most common problems with 2023 HYUNDAI Ioniq 5?

The most common problems reported for the 2023 HYUNDAI Ioniq 5 are organized by component above. Each component section shows owner-reported issues, crash reports, and fire incidents to help identify patterns and problem areas.

Where does this 2023 HYUNDAI Ioniq 5 problem data come from?

All problem and complaint data for the 2023 HYUNDAI Ioniq 5 comes directly from the National Highway Traffic Safety Administration (NHTSA) database. These are real complaints submitted by actual vehicle owners.

How do I report problems with my 2023 HYUNDAI Ioniq 5?

You can report safety problems with your 2023 HYUNDAI Ioniq 5 directly to NHTSA at SaferCar.gov or call 1-888-327-4236. Your complaint helps identify patterns and may lead to recalls or investigations.

Where can I find my VIN to check problems?

Your 2023 HYUNDAI Ioniq 5 VIN is located in 4 places: (1) Dashboard near windshield on driver's side, (2) Driver's door jamb sticker, (3) Engine bay, (4) Vehicle registration and insurance documents.

Is the 2023 HYUNDAI Ioniq 5 reliable?

Reliability can be assessed by reviewing the number and severity of owner complaints for the 2023 HYUNDAI Ioniq 5. Check complaints by component, crash reports, and fire incidents above to evaluate potential issues and problem patterns.

2023 HYUNDAI Ioniq 5 Problems

ELECTRICAL SYSTEM

110 complaints

twice this car has has experienced iccu failures. both time the car was on the road traveling when electrical system failure warning was alarm. last incident had to stop along road and towed to hyundai shop

Feb 01, 2026

The 12 V battery failed within two years of the delivery of the car. I believe this is due to the design of the charging unit within it as many other others report the same problem.

Feb 01, 2026

Unknown or ICCU car constantly has 12v battery probably and requires a jump start 1 to 2 times a month. The dealership can diagnose the issue cause the problem has to happen at the dealership and they can't replicate it. I've left my car there for 2 weeks and they couldnt replicate it. When I get it back, with in 2 weeks the car has the 12 volt issue and then fails. We tried to do what the dealership asks, tow it in, but that can't be done without the battery being reset and then they can't replicate the error.

Jan 29, 2026

The car became inoperable after a "Check EV" warning appeared. The vehicle had to be towed to the dealership. Fortunately I was able to avoid an accident. The dealer tells me that the ICCU (Integrated Charge Controller Unit) failed which was part of an earlier recall that I took the car in to the dealer for and they only updated software but now the related hardware has failed afterwards. This is something that is extremely unsafe if it happens while driving. Hyundai needs to correct this with an improved and safe ICCU.

Jan 28, 2026

ICCU failure after initial recall

Jan 28, 2026

+ 105 more complaints for this component

ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

22 complaints

The ICCU in my car has failed twice, within an 8 month period. At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU. After driving the car a short distance, the dashboard displayed warning messages to "Check Electric Vehicle System" and to pull the car to a safe area. Fortunately, I was not moving fast and I was able to get the car safely parked within a few minutes.

Jan 28, 2026

The ICCU in my car has failed twice, within an 8 month period. (this submission is to report the 2nd occurrence) At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU. After driving the car a short distance, the dashboard displayed warning messages to "Check Electric Vehicle System" and to pull the car to a safe area. Fortunately, I was not moving fast and I was able to get the car safely parked within a few minutes.

Jan 28, 2026

While driving on the freeway I heard a pop and a saw a warning notification on the dashboard to check the vehicles electrical system. This was followed by a warning that power was limited which resulted it the vehicle speed decreasing to 30mph, and finally a notice to stop the vehicle immediately. All of this occurred in about 5 minutes time. Thankfully, I was able to pull over to the side of the road without an accident. After this the vehicle became inoperable including hazard flashers. I had to wait on the side of the freeway for about an hour to get a tow. The vehicle was towed to a dealer which confirmed that the ICCU and high voltage fuse were faulty. My safety during this process was put at risk because A) during a snow storm I had to pull the vehicle over to the side quickly across 4 lanes of traffic and B) then remain parked on the shoulder with limited ability to notify other drivers that I was on the shoulder. The dealer has confirmed the failure, the vehicle is available for inspection, and the manufacturer has not inspected the component.

Dec 04, 2025

Car won't charge on Level 1 charging; it popped the GFCI in my garage and now no longer charges on level 1 (regular slow AC charging).

Oct 12, 2025

The Integrated Charge Control Unit failed despite having all related recall repairs/actions implemented. Failure occurred while pulling into a parking place after completing level 2 charging to 80%. The failure has not yet been confirmed by the dealer, but all common symptoms match this failure including hearing a pop sound from the rear of the vehicle followed by “Check Electrical System” indication and limited distance low power, low speed mode. Had this happened while driving at highway speed, the sudden loss in power and speed could have been dangerous to respond to and get off the highway safely. The vehicle is scheduled to be inspected by the dealer shortly.

Jul 10, 2025

+ 17 more complaints for this component

UNKNOWN OR OTHER

17 complaints

ICCU Unit went bad in 2025. Car totally dead. Jumped, taken to dealership, about 1 week to fix ICCU and blown fuse. A couple months later car totally dead again. Now bad battery. I am concerned about driving anywhere now. Was stranded last time it totally died. 75 year old female, should not have to pay $699 a month for iffy Ionic 5 and rent a dependable vehicle if I travel to visit friends and family.

Jan 23, 2026

I am reporting a safety concern with my 2023 Hyundai Ioniq 5 related to Hyundai placing remote safety features behind a paid subscription. Hyundai has locked two functions that affect safety: (1) the ability to remotely check the vehicle’s battery state of charge, and (2) the ability to remotely unlock the doors from a phone. These functions previously existed under BlueLink but were removed unless the owner pays for the new Connected Services package. 1. Remote battery status Without paying the subscription, I cannot check the vehicle’s battery level while it is charging. If I need to leave the charging area or am charging from home and not directly watching the dashboard, there is no way to verify whether charging completed or stalled. Charging interruptions are common with EVs. This could leave me stranded unexpectedly in unsafe conditions, at night, or in severe weather. This is a safety issue, not a convenience issue. 2. Remote unlock Hyundai also removed the ability to unlock the car from my phone unless I pay for the subscription. This creates a safety hazard if a child accidentally locks themselves in the car with the key fob inside. Without remote unlock, the parent may have to break a window or wait for emergency responders, which creates risk of heat or cold exposure to a child. This problem is reproducible every time I attempt to use the app without a paid subscription. Hyundai has been contacted and has not offered a safety solution except paying the subscription fee. I am asking NHTSA to review whether locking basic safety functions behind a paywall creates a safety defect that could put vehicle occupants at risk.

Dec 11, 2025

The car was fully charged and all of a sudden displayed a limited power warning and stopped driving completely. We were stuck on a road and had to get a tow truck. The tow truck was able to get power to the battery to drive it up on the bed. It was fully dead -couldn’t even unlock the doors. It’s been at Hyundai for 3 days and they are replacing the ICCU fuse. From what I read this is a very common issue

Dec 03, 2025

ICCU FAILURE. Car was being parked at night and there was a pop sound towards the back. It sounded like I ran over a branch. Immediately I received a “Check electrical vehicle system” warning light. The car could not be shifted into drive. It was towed the next day to the dealership. Oddly enough I had an appointment later that week with the same dealership to address the ICCU recall but part failed before it could be addressed. The car was able to be repaired within 10 days. No loaner provided because dealership had a 20 people waitlist. I had to rent a car instead. When looking into this issue online, a 10 day turnaround time seems on the shorter end of the typical timeframe. I’ve heard stories online (see Reddit) and seen YouTube videos of people waiting months.

Jun 23, 2025

- The ICCU assembly failed while I was driving on the highway. - The ICCU failed even after I had the car taken in due to a recall on the ICCU unit. In other words, the repair that they suggested I do to the ICCU DID NOT WORK, which means I was driving a dangerous vehicle. - When the ICCU failed, the car slowed down to 25 miles an hours and then a crawl while I was driving on the highway with my family. I was lucky to not get into an accident. - I have taken the car into the dealer and they have told me it will take up to two months to get the ICCU fully replaced because the unit in my car failed even though I had it repaired during the recall. - I have contacted Hyndai requesting they buy back my car because it is unsafe to drive. They have not responded. - YOU NEED TO GET THIS SORTED OUT ASAP. THE RECALL REPAIR ON THE ICCU DID NOT WORK AND THERE ARE OTHER CARS THAT ARE AT RISK OF FAILING.

Apr 15, 2025

+ 12 more complaints for this component

POWER TRAIN,ELECTRICAL SYSTEM

13 complaints

While driving my 2023 Ioniq5 I got a warning on the dashboard about losing power and immedately the car slowed itself down to about 15 MPH, once I was able to get to a safe spot to pull over I stopped the car and it would not start again. I had it towed to the dealer and it has been a week and the ICCU is still on backorder. No idea when I will have the car back.

Jan 27, 2026

Vehicle experienced sudden loss of power while driving at highway speed. While driving on the interstate at highway speed in dark, snowy, high-traffic conditions, the vehicle displayed a warning about an electrical system fault and instructed me to “stop safely.” The vehicle immediately lost some propulsion and ramped down speed. We were only narrowly able to exit the highway before it would not move further. We were very lucky that no one hit us- it is extremely unsafe to drastically decrease speed on highway. Our family was in the car and it was very, very scary. We were able to use the heating system while parked for a few minutes before we lost all power completely. The vehicle was towed to a Hyundai dealership and is completely inoperable. The service manager stated the failure is consistent with a known ICCU (Integrated Charging Control Unit) failure. The dealership reports having many Ioniq vehicles with similar ICCU failures awaiting backordered parts, with no estimated repair timeline.

Jan 20, 2026

Upon entering vehicle in the morning of 12/30/25, a notable smell was first present. After turning on the vehicle, the car dashboard showed a "Check electric vehicle system" warning. The car was not able to be put into any gear besides neutral. Car was towed to dealership, and received word on 1/2/26 that an ICCU failure was the cause.Thankfully this occurred while parked in my garage, so was not in immediate danger. Perhaps this isn't a safety issue, but I am not sure what would have happened had the ICCU blown while driving so thought worth reporting.

Jan 02, 2026

Car gave an error check electrical system and went into limp mode on highway slowing to 25mph.

Dec 26, 2025

I purchased my Hyundai Ioniq 5 on [XXX]. Since then, I have experienced repeated and dangerous failures of the air-conditioning system, which Hyundai and the selling dealership have failed to properly diagnose or repair. On [XXX], while driving, I heard a very loud banging noise coming from the front passenger side of the vehicle. Immediately afterward, the air-conditioning system completely shut down and stopped producing cold air. Before the extreme Arizona heat began, I repeatedly asked Hyundai on Bell Road in Glendale to properly diagnose the A/C system due to ongoing concerns. Despite the vehicle being under warranty, the technician told me I would have to pay a diagnostic fee before they would evaluate the A/C. As a result, the underlying problem was not properly diagnosed or repaired. On [XXX], the exact same failure occurred again the same loud banging noise followed by a complete loss of air conditioning. The vehicle was taken to Hyundai on Bell Road in Glendale a total of four (4) times, spending 33 days out of service for the same issue. Despite this, the dealership failed to repair the vehicle. On several visits, the car was simply parked, and the dealer later claimed it had been “fixed” one time, even though the problem continued. This defect created a serious safety hazard. During one incident, while driving the vehicle in extreme heat to the dealership for repair, the interior temperature became dangerously high. My phone overheated and shut down, and I nearly passed out while driving. Hyundai Corporate has been unresponsive and dismissive. Rather than addressing the repeated failures and safety risks, I was referred to Lemon Law, where my claim was denied, despite the extensive repair history and time out of service. Instead of repairing the defect or taking responsibility, both the dealership and Hyundai Corporate pressured me to trade in the vehicle and move on, without resolving the underlying problem. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Dec 23, 2025

+ 8 more complaints for this component

POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

11 complaints

After having service done for the past two ICCU recalls months and months ago, I’m driving along today and hear the loud pop that everyone else reports. My car immediately went to a reduced power state where I was able to limp a bit further until I lost all power. I had to have the vehicle towed (by a wheel lift/dolly equipped wrecker - do not allow a flatbed they’ll drag your car into the truck) to the nearest dealership and now await to hear how long I’ll have to be without it.

Jan 30, 2026

INCIDENT DESCRIPTION: On November 24, 2025, while driving at ~60 mph on NYS Route 17 (highway) with ~15% battery charge, my 2023 Hyundai IONIQ 5 suddenly entered limp mode and lost motive power. The high-voltage battery state of charge dropped instantly from ~10-15% to 0%, triggering error code P1B9600 (HV battery cell imbalance—cells failing to charge/discharge properly). I was unable to fully remove the vehicle from the roadway. My elderly mother was a passenger; a passing tractor-trailer came within 1 ft of striking us when disabled. NY State Police responded (report available). Required $300 tow to the Hyundai dealer, stranding us 150 miles from home.//PRIOR RELATED FAILURES: 1. November 14, 2025: Stranded due to ICCU failure (recall 24V-868 related) (stranded on NYS State Route 444). 2. September 15, 2025: Same P1B9600 code/limp mode/power loss; stranded in the middle of active travel lane of NYS 444; NY State Police report filed. 3. August 2025: Initial HV battery-related sudden power loss; stranded on Interstate 90 Eastbound (Erie, PA area). Despite repairs (September 2025 ICCU/"limp mode" software updates; October 2025 ICCU/high-voltage fuse replacement under recall 24V-868), defects persist. The vehicle charge rate also appears low and the battery consumption rate seems high.// CURRENT STATUS: Dealer (Vision Hyundai) confirmed high-voltage battery pack defective, requiring full replacement. Vehicle purchased new October 2024, under warranty. In service since mid-November 2025 (>30 days downtime). Provided loaner now, but prior rentals unreimbursed.//SAFETY RISK: Repeated sudden power losses create extreme highway crash risk, especially with vulnerable passengers. I am a licensed professional mechanical engineer, and can provide technical logs, repair orders, police reports upon request.The issues I have experienced appear to be linked to ongoing ICCU/HV system issues in IONIQ 5. I respectfully request expansion of the recall investigation.

Dec 21, 2025

Vehicle warning alarm came on with message to immediately pull over and check power supply. Towed car to dealer where ICCU and fuse were replaced. This after 1-2 recalls were completed.

Jun 02, 2025

Was driving in Bellevue, WA leaving a parking lot. Heard a "pop" sound, and immediately had a "Check Electrical System" warning come up on the dash. From previous experience in 2024, was aware this requires immediate dealer inspection, so started driving to the dealer 6 miles away. After less than a mile, lost most power but was able to drive slowly into an office parking lot. Called Hyundai Roadside Assistance who sent a flat bed tow truck to transport the car to the dealer. ICCU was replaced in May 2024 after similar symptoms. The current ICCU (which is likely the failed component) was in service for less than a year.

Apr 01, 2025

After all of recall software updates were applied the ICCU still failed with no warning beforehand and resulted in power and propulsion failure.

Mar 26, 2025

+ 6 more complaints for this component

ELECTRICAL SYSTEM,ENGINE

11 complaints

The ICCU in my 2023 Ioniq 5 has failed for the second time. The 12V battery is dead and the car cannot be driven. It will be sitting at the dealership waiting for a new part for at least a month. Hyundai claims to have fixed the ICCU problem but from online reports it is clear that they have not solved this problem.

Jan 29, 2026

ICCU failed while driving, car limited speed immediately. This was after software recall was preformed a few months prior. Car went limp mode and repairs are going to take an indefinite time.

Jan 14, 2026

I purchesed the Hyundai ionic 5 2023 from hyandai dealer ship. It had 42 k miles. The car ran good. So I got it. They promised me before the I bought they would charge it up free. When I signed the paper they said they couldn't charge it for me. I drove 5 miles the original battery died. I almost got to accudent only 5 miles away. I figured it was original battery. I change battery. I get tow truck to take home i put new battery in it. Then 5 days later the main iccu stopped charging. Another 12 bolt battery drain. They new it had that problem. Two batteries are main iccu won't charge. They make me sign paper buy as is i didnt think it would die 5 miles later they new it had a serious problem I look on internet the same car had recalls for the same car not on mine My car should have been recalled I heard 1000 s were affected with the same problem. They new it would fail on me thars why they get me to sign the papers. I hooe it's not 21 k down the drain I hope i dont have to spend 15 k on new iccu.

Dec 29, 2025

The car would not start when start button was pressed. Warning on the dash said 12v battery critically low. This happened on three different occasions. After jump starting the car, everything works as normal. I am able to turn off and turn on again as expected. 12v battery was tested and seems to be fine. Even the OBD2 readings show battery as working correctly. There seems to be a software glitch that makes the car think that the 12v battery is low. The high voltage battery was charged to above 70 at least on all three occasions. Now I carry a external jumper battery to avoid this situation

Sep 10, 2025

When i was out driving with my little daughter, in the middle of the road, the car showed a warning of “check electric system”. The car was very slow and went into limp mode. I had to quickly park at a shoulder. Called roadside assistance, they sent a tow truck within 40 mns, the car was completley dead when they arrived. They had to send another tow truck that arrived after another 35 mns. I had to wait in the heat with my little daughter till they transferred us to the dealer , the repair for the iccu failure took 2 weeks. Now i am very scared each time i drive the car that this might happen again.

Jul 02, 2025

+ 6 more complaints for this component

POWER TRAIN

9 complaints

ICCU failed while at highway speeds (65mph). Car went into 'turtle mode' limiting the car to 10mph. No warnings were provided prior to the incident. I was in the left of three lanes and had to make emergency actions to get to the Right shoulder across traffic. Traffic was obstructed. Was left stranded until a tow truck was available. Dealer confirmed ICCU failure.

Jan 28, 2026

The car had no power on Monday [XXX]. It was taken taken to Tasca Hyundai in Hartsdale NY. The service manager told me it was the ICCU and 12v battery. This had previously been repaired on 12/11/24 under recall according to Hyundai's own records. The current service manager has no idea when the part will be available, possibly not for weeks. The car has been serviced according to Hyundai's maintenance schedule and recall notices. In fact the car went for maintenance one week prior to the part failure. No recall notice for this failure has been issued INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Jan 23, 2026

My vehicle displayed a Check Electrical System failure warning and experienced a complete loss of electrical power. Since it is an electric car, the car would no longer run. No light including emergencies lights worked. This happened to me in my driveway. But it happens to other owners driving down the freeway and they suddently have to pull over. Hyundai advised me to have the car towed to the dealership service center where they diagnosed an ICCU failure. This has been happening to to 2-5% of Kia and Hyundai electric cars. I was told the ICCU was on extreme backorder. I waited ~6 weeks for my car to be repaired. Note that there were two recalls for the ICCU unit previously and I performed those recalls promptly. There were no other warnings at all before the Check Electrical Systems error and sudden loss of power.

Jun 15, 2025

My Ioniq 5 has encountered the renowned "ICCU" failure -- 35k miles in, 2.5-3yrs of ownership. I had a loud 'pop' noise behind my driver seat occur and then my vehicle went into limp mode. The ICCU failure is confirmed by the dealer, but the part is on massive backorder nationwide...

Apr 01, 2025

Failure of the Vehicle Power Supply system. ICCU failure. Car was alerting and would not go over 24mph. This is the result of a recall that I had already brought in the vehicle for in April, but they only performed a Pass/Fail test and at the time it "passed" so they didn't replace the ICCU and fuse that is required to be replaced. Two months later the car died, had to be towed and now has been at the dealership for two weeks already - 17waiting for the parts to come in. This is ridiculous because Hyundai is aware of this problem and is not fixing the issue, merely kicking the can down the road and then stranding owners for weeks without their vehicles. Unacceptable.

Jun 24, 2024

+ 4 more complaints for this component

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE

8 complaints

ICCU Failure — Severe Safety Risk and Repeated Incident The ICCU in my Hyundai has failed twice. Both times, the car suddenly and completely lost power while I was driving — no warning lights, no gradual slowdown, just total loss of control. This created an extremely dangerous situation that put me, my passengers, and everyone around us at risk. When the ICCU fails, the vehicle shuts down instantly and becomes completely inoperable. During the most recent incident, I spent more than eight hours on the phone with Hyundai attempting to arrange a tow. When the tow truck finally arrived, the driver instructed me to shift the car into neutral. The moment I did, the car died again and became stuck in neutral, preventing the driver from towing it. He then left, unable to assist, leaving my disabled vehicle parked on a public road — on a hill — where it posed a further safety hazard. Hyundai’s response to these failures has been temporary at best. This issue continues to reoccur, making the vehicle effectively unsafe to drive at all times.

Oct 20, 2025

Had all previous open recalls for iccu performed. No previous warning in car. Driving unto free way. Loud noise like a tire pop. 12 volt low power warning on dash screen. Car began to lose power. Picture of a turtle shows up. Low power warning. Car lost power within 10 seconds. And couldn't accelerate. Extremely dangerous. Once completely stopped the car turned off and couldn't start again. Was able to get car to turn on with jumper cables by tow truck. But couldn't get to "start" engine. Dealership says the 12 volt battery and iccu needs to be replaced. They are blaming the issue on the fact that I had an aftermarket subwoofer installed and don't want to cover under warranty. Car ran fine with said subwoofer for a year prior with no additional changes. Have used same subwoofer and amp on multiple cars with no issue.

Sep 12, 2025

The car lost its ability to accelerate during rush hour on a very busy interstate while I was in the far left lane. It started by jerking really hard off and on, like a very hard brake for a second, and then normal for a few seconds, and then hard braking again. I could accelerate after the "braking". There were no warnings or errors. This continued for about a minute while I was trying to decide if it was triggered by accelerating or braking, and I couldn't figure it out. At that point, I couldn't accelerate and received a number of lights and a message to check the EV system or the electrical system. I don't remember because at that point I was trying to immediately figure out how to pull over and not get hit. Luckily, it was slow enough and traffic had just thinned out enough, having passed a popular exit, so that I could coast to the shoulder across all of the traffic. I noticed at this point that the car was in neutral. I couldn't shift into drive, however. I tried to see if turning it off and back on might help. It did at that point. There were no error messages, and I could shift into drive and drive normally after turning it off and back on. Again, I wasn't concerned with documenting an error message that I assumed would be stored. The car is available for inspection. The safety of myself and my kids and other drivers around me was at risk as we could not accelerate and I was in the far left lane to the right of an express lane and left of a lot of traffic to have to cross to get out of traffic. No, the problem has not been reproduced, and it was taken in the next morning to the dealer who found nothing wrong and no stored error codes. No lamps or messages appeared before the loss of acceleration and promptly disappeared after restarting the car. Nothing was stored for the dealer to retrieve, either. The dealer ran diagnostics and found nothing wrong.

May 19, 2025

Code P1A9096 Iccu and fuse. The car is currently at a dealer in Barre, VT. While driving numerous warning lights appeared lowering my speed to 10 MPH immediately leaving me vulnerable to a collision in moving traffic. Warning lights include "Check Vehicle Electric System", "Power Limited". Issue confirmed at dealer.

May 13, 2025

While reversing slowly, I heard a "pop" noise (sounded like balloon popping) from the rear of the vehicle, and within 15 seconds later, a "Check Electric Vehicle System" warning appeared on the dash alongside the check engine light. About 5 minutes later, I received another warning that said "Stop Vehicle and Check Power Supply" and noticed the car was losing power. Was able to get it home to get it towed, but this was within 2 months after receiving the ICCU recall for this vehicle, and it seems the ICCU has failed again.

Apr 14, 2025

+ 3 more complaints for this component

ELECTRICAL SYSTEM,UNKNOWN OR OTHER

6 complaints

Hyundai model Ioniq 5 (all years and trim styles) have a known issue with ICCUs (Integrated Charging Control Unit) that fail. This component controls charging of the 12 volt battery, and in turn electrical systems. Hyundai replaced my ICCU, but I am concerned it may fail again, as the underlying issue does not seem to be known or addressed. When the ICCU fails, the vehicle can suddenly lose the ability to move. This can be extremely dangerous if the car is in motion and unable to safely pull over. Luckily, my ICCU failed in the middle of a parking lot. Many Ioniq 5 owners report this issue, some multiple times on multiple ICCUs.

Jan 21, 2026

On 12/13 while driving back home at a red light at night, we heard a loud pop at the driver's rear side and suddenly the dash displayed a warning stating "Check electric vehicle system". The car then would not drive past 25 mph and kept flashing the warning. We got it home safe, and planned on dropping it off at the dealership the next day after jumping it. The next day however, after multiple attempts to jump the car's battery, it would not start enough to move it. The car would start and then flash a warning saying that the 12V battery voltage is low and then shut off again. It had to be towed on 12/15 to the dealership where they will be doing an diagnosis.

Dec 15, 2025

My EV failed to charge using a home or public charger. The dealership determined that the ICCU of my Ioniq 5 failed and replaced it under warranty. I previously had evey software update and recall related to the ICCU performed, yet it still failed.

Nov 28, 2025

I bought this ioniq 5 pre-owned at 10,000 miles on 6/21/25. Clean carfax and no active recalls. One mile off the lot the system I received the message "12V battery voltage low. Stop safely." The car completely turned off. Could not put it in neutral. I was stranded on the road and it could have caused an accident. I got it towed near an auto shop and bought a new battery, thinking it was just a dead 12V battery. The car turned on and seemed to resolved the issue, but after 20 minutes of driving, it completely turned off again on the road. Very dangerous. I dropped it off at Platinum Hyundai of Tracy dealership and am awaiting a diagnostic.

Jun 24, 2025

In late January 2025 I took my Ioniq 5 (an EV) to the dealer for service under a recall. The service called for a software update in regard to the Integrated Charging Control Unit (ICCU). The next time i attempted to charge the car charging failed. The dealer subsequently determined that the ICCU had failed. The car has been in the shop for two months and counting, as Hyundai is unable to supply the parts necessary for the repair. This happened without warning, although there are many other reports of similar incidents.

Apr 13, 2025

+ 1 more complaint for this component

TIRES

6 complaints

There seems to be a wide spread issue with the foam on the interior of Ionic 5 tires, Michelin 235/55/R 19. The foam dislodges from the interior of the tire and causes severe vibrations when driving at over 60 mph. The issue causes the tires to be unbalanced and can cause damage to the car. Wondering why Michelin doesn't address this issue and issue a fix other than stripping the tires of foam. My Hyundai dealer told me this is an on going issue and they have received no guidance from Michelin or Hyundai.

Oct 22, 2024

On [XXX], while driving north on [XXX] to Michigan, I stopped in Carmel, IN to charge my 2023 Hyundai Ioniq 5 SE RWD vehicle. After charging, I reached 45mph and immediately experienced violent shaking of the steering wheel and seats. The vehicle was immediately driven to Hyundai of Carmel for inspection and possible maintenance. A service technician drove the vehicle and experienced the issue, but could not recommend a solution. The vehicle was driven back to Louisville, KY (home location) and taken to a Tire Discounters the following morning. At Tire Discounters, a technician drove the vehicle and experienced the same behavior, but could not provide a solution. Numerous trips to multiple Hyundai dealership service departments and tire service centers (Big-O-Tires and Tire Discounters) resulted in no solutions. After extensive research, a potential solution was identified by the vehicle owner relating to the noise-isolating foam located on the inside wall of the tires. There are numerous reviews on Michelin's website documenting this specific issue with the tires. A call to Michelin costumer service successfully concluded with a warranty claims number. However, none of the previously mentioned tire service locations would investigate because the vehicle only had 6,400 miles and the Hyundai dealership service departments refused to address the problem. Ultimately, Pep Boys accepted the Michelin warranty claim and found that three of four tires (Michelin Primacy 235/55R19 101H) that came as part of the original vehicle purchase had the internal isolation foam disconnect from the tire belt and gather in a central location inside the tire. There has been no evidence of notices or information from Michelin to dealerships or service departments regarding this issue and the potential for dangerous driving conditions or damage. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Aug 27, 2024

Michelin Primacy AS 235/55 R19 - OEM tires on Hyundai Ioniq5 acquired new in September 2023 - mileage at the time of incident 10,800 miles Front tire started went off balance causing steering wheel vibrations and shaking that increased with speed - car was not drivable above 55MPH due to excessive shaking and vibrations of steering wheel - this presents safety concern as it may lead to loss of control and excessive wear and tear on other suspension / wheel components. I took the vehicle to a local tire shop (Town Fair Tire in Norwalk CT - authorized dealer of Michelin tires) - got wheels rotated, balances and alignment adjusted. The issue persisted - on the second visit tire shop dismounted one of the tires and discovered internal foam band unglued and clumped on one side of the tire causing off-balance. The shop recommended removal of the foam material and rebalancing of the tire to correct the manufacturing error.

Jul 31, 2024

My car has 16000 miles and originally came with this exact tire brand. Apparently, because I drive an electric vehicle the tires have sound dampening foam on the inside of them. They are supposed to break down slowly with time however the last four months I have had two incidents where the foam became unglued from the rest of the tire, balled up, and caused a huge amount of shake in the car as I drove at speed 60 mph or higher. It did not affect low speeds. This is a safety hazard. The first time it occurred, I considered an outlier and Michigan did replace the tire. The second time it happened , only a few thousand miles later I asked that the foam be removed from the tire as I am concerned that this is a safety hazard moving forward. Michelin needs to have this tire recalled. I asked the Hyundai dealership if other ionic five drivers with the same tires had come in with the same issues. They said absolutely we see it every day. Why is this tire still on the road. I reached out to Michelin and they Refused to refer me onto anybody to discuss this further. They also refused to pay for the foam removal process. That is why I’ve decided to involve you. Please feel free to contact me at [XXX] to discuss further. Thank you for your consideration, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

May 22, 2024

Car bounce if at 62 MPH had dealership check balance and rear two tires could not balance. Dealership de-rimmed tires and found the inner foam has fallen or detached from the inside of tire causing. Resulting in foam moving around inside tire throwing g off balance.

Apr 10, 2024

+ 1 more complaint for this component

FUEL/PROPULSION SYSTEM

5 complaints

The iccu failed causing the vehicle to suddenly go into limp mode

Apr 23, 2025

June 2023 - 12 volt battery discharged overnight on consecutive nights. Dealer service eventually claimed that the problem was the navigation head unit was faulty and continued to draw current after the vehicle was turned off. The process took over 4 weeks to remedy since the necessary part was unavailable. January 2025 - While driving, a warning to stop the vehicle and check the power system appeared. After a few minutes the vehicle lost power and went into "limp home mode" which limits the vehicle to 25 mph. This problem was attributed to a failed ICCU. However, due to lack of availability the vehicle has been in the service department of the dealer for 3 weeks (Jan 17,2025 to Feb 4, 2025). The dealer estimates that it will be at least Feb 14, 2025 before the car can be repaired. While these two incidents may be unrelated, the result has been the same: the 12 volt battery does not stay charged up rendering the vehicle unusable. For drivers and passengers it is unsafe to operate the vehicle when speed is limited to 25 mph. I understand there is a recall on this part, but Hyundai's lack of support for providing replacement parts in a timely manner is causing owners of these vehicles to continue to drive them until the part actually fails which often happens at an inopportune time.

Feb 04, 2025

Latest recall had been applied, 2 weeks later a dead 12V. New one put in and 4 weeks later a pop and an immediate pull over vehicle charging system needs inspected. ICCU failure.

Jun 16, 2024

Vehicle's charging port appears to be overheating to the point that thermal throttling is occurring when attempting to charge. This issue first occurred in mid-May of 2024. Vehicle charged as normal before then. Vehicle was serviced by dealership for this issue on 05/29/2024. A software update was applied that did not solve the problem. In an attempt to find updates on this problem, I contacted Hyundai Customer Care by phone on 05/30/2024. Hyundai Customer Care agent read a scripted response that was first released to the public in 20203 and advised to wait for an unknown amount of time for an unknown fix which may or may not come to pass. Hyundai Customer Care had no updates more recent than the 2023 release from which the Customer Care agent read. This appears to be a known issue with no actual fix available to the customer and no ETA on when such a fix might be released.

May 30, 2024

The ICCU has failed after the recall repair was completed in September 2023. When the fuse pops the car indicates a check electric vehicle system message in the driver information screen.

Feb 06, 2024

SERVICE BRAKES

5 complaints

The brakes lights do not illuminate when slowing down using regen braking. This has cause cars to stop very close to rear-ending me. This video explains this issue in great detail https://www.youtube.com/watch?v=U0YW7x9U5TQ

May 26, 2023

The regenerative braking will not turn on brake lights unless the accelerator is fully unpressed. In the more aggressive modes (L3 and I-Pedal), the stopping power is very strong. Without brake lights, it catches other motorists off guard and they nearly hit me. For reference, I-Pedal mode is able to bring the car to a full stop on its own. This is dangerous. The brake lights need to come on depending on the rate of deceleration, not the accelerator pedal state. This can happen at any speed, but becomes more dangerous at highway speeds.

May 25, 2023

When using most of the regenerative braking levels, including the one-pedal driving mode named “i-Pedal,” the brake lights will not illuminate until the drivers foot is fully off the gas pedal, or manually applying the brakes. This can create a dangerous, life threatening scenario leaving surrounding drivers unaware the vehicle is slowing. This has not been reproduced by the automaker not inspected by them, police, insurance, etc but has been verified on video. No warning lamps appeared.

May 25, 2023

Brake lights do NOT come on when decelerating in I-PEDAL mode and Level 3 regen brake modes, perhaps more. The car should instead generously apply brake lights by default anytime deceleration occurs via regen braking.

May 25, 2023

Brake lights do not lit while decelerating using regen braking system without letting foot off of accelerator. There is no indication for vehicle behind mine to decelerate which can result in collision

May 25, 2023

FORWARD COLLISION AVOIDANCE

4 complaints

I was traveling 70mph on Interstate 70 when I heard a loud “pop” sound and the car immediately slowed down to 20mph in heavy traffic. The care then would not go over 20mph.The car was charged at home the night prior. On the dash was the “stop vehicle and check power supply” warning. This is the very common ICCU issues known to plague the Hyundai EV fleet. This is very dangerous when your are in heavy interstate traffic going at a high rate of speed.

Jan 02, 2026

I was driving at night on a freeway marked as a 65mph speed limit. I had the adaptive cruise control turned on and set to automatically follow the road speed limit. There was intermittent rain at the time. Suddenly my car began to accelerate, but I was able to stop the acceleration by stepping on the brake to disengage cruise control. I tried re-engaging cruise control and it immediately accelerated strongly again. That is when I noticed the cruise control speed had been set to 85mph. I disengaged cruise control for the rest of my trip home and was able to drive normally. Subsequently I learned that the car detects speed limits by both map data and visually recognizing speed limit signs, so I assume it mis-identified a 65mph sign as 85mph. The auto speed feature set the cruise control speed to 85mph even though that is much higher than any possible speed limit in California. I disabled the auto speed feature of the adaptive cruise control and have not had any problem since then.

Mar 09, 2024

The contact owns a 2023 Hyundai Ioniq 5. The contact stated that while driving at an undisclosed speed, a Jeep veered into the driver’s path, and the Forward Collision Avoidance: Automatic Emergency Braking system failed to activate as designed. There were no warning lights illuminated. The vehicle was taken to the local dealer, who determined the vehicle was working as designed. The vehicle was not diagnosed or repaired. The vehicle was taken to another local dealer, Feldman Hyundai of New Hudson (30492 Lyon Center Dr., New Hudson, MI 48165), who stated the vehicle was working as intended. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 15,000.

Feb 13, 2024

I'm surprised there are no safety recalls on this vehicle given how Cruise Control operates & how close to the Cruise Control toggle switch the steering wheel is indented for hand placement at 10 a.m./2 p.m.We purchased a 2023 IONIQ 5 on 02/25/2023.When the vehicle was delivered to us we were not told that the cruise control does not disengage when the brake pedal is applied.It merely pauses.There is nothing in the owner's manual that addresses cruise control operation.In any other vehicle we have owned, including other Hyundai vehicles, cruise control cancels when the brake pedal is depressed.Without proper training/information & without cruise control being addressed in the owner's manual we had no way of knowing this.2 months after purchasing the vehicle, while pulling into a parking space driving 3 MPH I stepped on the gas & the vehicle returned to the previously set cruise control of 45 MPH.Whereupon it went over a parking bumper, landscaping, curb, $ into a busy street, scraping the passenger rear portion of the vehicle & damaging the wheel.We took the vehicle to the dealership, Larry H. Miller on 05/03/2023. They were unable to duplicate the mishap.The GM of the dealership indicated that in all probability what occurred was inadvertent touch of the toggle switch.He indicated that this unique cruise control operation was experienced by others, including himself.On 05/24/203, he recommended we contact Hyundai Motors USA to report the incident.Doing so resulted in numerous phone conversations, emails, and 2 inspections of the vehicle. Finally, on 10/19/2023 we were advised in a HMAUSA letter of resolution that said, "no manufacturing defect was identified." They are refusing to pay the $2,247.92 repair bill (on 04/26/23.May be higher now due to rising costs.)We maintain the incident occurred due to a design flaw & unique cruise control operation.We not only want Hyundai to pay for the repairs, we want the NHTSA to investigate so this won't happen to anyone else.

Nov 13, 2023

ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

4 complaints

ICCU failure, confirmed by dealer. Vehicle was parked in garage connected to charger. The ICCU fuse blew, and the house breaker was tripped. The vehicle failure also ruined the Grizzl-E EVSE (charger).

Nov 19, 2025

Was driving on highway and started receiving error messages for "check electrical system". Car speed dropped to max of 45mph while actively on a highway. Was able to pull off an exit but car needed a 55 mile tow to the closest dealer. Dealer has identified that the ICCU needs to be replaced but has no timeline as the item is on back order. Car is model year 2023, purchased in February of 2023 and has 22,000 miles on it.

May 08, 2025

Rear electric motor overheating on highway and motor shuts off only allowing front motor to work but acceleration is near nothing and is extremely dangerous. No codes or warnings pop up was told by friends with other ioniqs that it's a electric motor oil pump that malfunctions but hyundai refuses to solution ND realize that there is a problem with motor malfunction

Sep 14, 2023

While driving on the highway, after about 45 minutes, the electric vehicle goes into Turtle power-limited mode. The vehicle instantly reduces in speed from 70mph to as low as 35 - 45 mph. There are no warning lights or sounds. If you immediately stop the car and let it sit, it will work again temporarily but after 30 - 40 more min or less of driving, it will again go into turtle mode. Additionally, acceleration is non-existent when its power is limited, inhibiting the ability to safely drive as required to pull over or across intersections. This has been a constant event occurring multiple times and each time the vehicle has been on a freeway or highway. The dealer applied the repairs in the photo supplied, but they did not work.

Aug 13, 2023

POWER TRAIN,ENGINE

3 complaints

One month ago, my car experienced an failure and the warnings on the dash reported to check the electrical supply and then to stop driving the car immediately. I had it towed to a dealership who reported the ICCU failed and it'd take 1-2 weeks to get replacement parts and repair. A month later, I was just told the part is on indefinite back-order and they have no ETA when a replacement part will be available. Hyundai is selling an unsafe vehicle without that can die on the road and have no way to fix the issue. Google "Hyundai ICCU failure" and you'll see this is a systemic problem and Hyundai is doing nothing to fix these issues and is putting out 2025 models that are dying on the road with no solution.

May 06, 2025

See uploaded photos and document.

Oct 16, 2023

EV goes into power limited mode when on interstate when going ~50 miles while driving 70mph or more. Happened each of my 3 times on interstate of about that distance. First time was Sat 4/29 while in eco mode with 70% battery and 82°F outside, 1 hr drive 50+ miles. Second time was in normal mode Friday 5/12, 55% battery 72°F outside 1 hr drive 50+ miles. Third time was in normal mode and it happened after 42 miles. I scheduled a service after the first incident but they were only able to take it on 5/31. When this happens you lose ability to accelerate and have to coast to the side of road and let it sit for 10+ minutes to clear and then can resume, I would take surface roads after it occurred. Impacts safety for self and others, as it drastically slows without brake lights causing a high chance of being rear ended. The last incident was close to it. As it was getting worse I stopped driving on interstate with it. Car has been at the dealership's service department since 5/31. They were able to easily reproduce once they finally got to it. They diagnosed a bit and then consulted design engineers. Diagnosed on and off for a couple weeks and have finally decided to replace the drive motor. Part received Friday 6/16, to be installed tomorrow 6/20. We'll see if that addresses.

Jun 19, 2023

VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE

3 complaints

Incident occurred when head-in parking in a space pointed into an stores exterior wall. There were no parking/wheel stops, just pavement then wall. No adjacent cars. I was decelerating with foot completely off accelerator and over the brake pedal. The car is an EV and was in 3rd level of regenerative braking, slowing down quickly. As I completed the turn into the space and began straitening the wheel, the car suddenly and rapidly accelerated and crashed into the wall. The only likely explanation I have is that I inadvertently pressed the Driving Assist button with my right thumb or hand while turning the steering wheel, which would have activated Smart Cruise Control, and, if the necessary conditions were met, set the minimum speed to 30 km/hr. The car manual states: "If your vehicle speed is between 0 - 20 mph (0 - 30 km/h) when you press the Driving Assist ( ) button, the Smart Cruise Control speed will be set to 20 mph (30km/h)." The Foward Collision-Avoidance Assist was set to Active Assist, which should have applied the brake to stop from colliding with the wall, but instead the car accelerated. (Note, the parking assist feature does not usually recognize head-in parking.) The car has two Driving Assist settings: Based on Drive Mode and Based on Driving Style. If the latter is selected, three additional features are set on sliding scales: Distance (close to far), Acceleration (slow to fast), Response Speed (slow to quick). These three settings are adjusted automatically based on the car's interpretation of the driver's driving style, or they can be manually overriden. I have never changed these settings. Post-incident I checked the setting and it was set to Based on Driving Style with Acceleration=Fast. Concerns: Is Driving Assist to easy to inadvertently activate? Should Driving Assist not activate at very slow speeds and not auto-set to 30k/h? Why did Forward Collision-Avoidance not activate? Drive Assist should not default to Based on Driving Style.

Jul 29, 2024

Crash: 1

HELP! I now regret that I bought a Hyundai Ioniq 5. I hoped the recent campaign would fix my problem, but I think it is now worse. While driving my speed drops 3 to 4 miles per hour, then the car lurches forward to regain my speed. At first I thought it was when using cruise. Now the car does it on the highway even when not using cruise. When it starts dropping the speed, the accelerator is not responsive. I have to wait for the car to slow completely down before the throttle will respond. I do not notice the problem around town. It seems to cruise fine for about 50 miles and then begin to slow and speed up out of my control. I think it is a safety hazard. It certainly drives me and my passengers crazy. PLEASE DO SOMETHING!!!

Sep 30, 2023

Driving on the highway, my car will suddenly lose power momentarily and the speed drop 3-5 mph. My accelerator is unresponsive. Then the car will accelerate quickly with a jerk to accelerate to the set speed. May occur on level ground but often occurs at the bottom of a hill. I have no control during this loss of power.

Aug 17, 2023

LANE DEPARTURE,FORWARD COLLISION AVOIDANCE

2 complaints

Due to a heavy brake application a water bottle in the back seat spilled and the water traveled under the drivers seat. This resulted in multiple car systems going offline, vehicle reporting LKAS error and inability to turn the car off. This essentially bricked the vehicle. Repair in order to correct the shorts and corrosion from the water both the drivers seat and main floor wiring harnesses require replacement cost estimate approximately $12,000. These key electrical connections under drivers seat are not adequately protected from simple water damage. This in my opinion makes the vehicle unfit for use as a family EV SUV as a simple water bottle still should not be able to brick a car. I consider this a design defect and the manufacturer is not covering this under warranty.

Dec 20, 2025

Several times now the "Check Driver Assistance System" and "Check Lane Assist System" have come on and stayed on. I brought the car dealership, and they fixed it--but only temporarily--the problem recurs within a few days of the fix. All of the sensor cameras are clean. I have read that a weak 12-volt battery can cause this problem, but the car has only 28k miles on it, so the battery should not be weak yet. I will bring the car back to the dealer (again) and have them check the 12-volt battery strength. But I am at the point where the "check system" messages are on more than they are working correctly.

Nov 20, 2025

FORWARD COLLISION AVOIDANCE,LANE DEPARTURE

2 complaints

I suddenly received errors that my sensors weren’t working, and I can no longer use my cruise control. The car has less than 60,000 miles so it still has the full bumper to bumper warranty. I have never had a collision. So I took it in to the dealer and they said the camera was mis-aligned and is not covered under warranty. It should be covered as I’ve never had a collision. Based on my online research, many people with Hyundai Ioniq 5s have experienced this same issue at no fault of their own, so it is a systemic problem. I took the vehicle to the Pohanka Hyundai in Fredricksburg, VA

Nov 04, 2025

Condensation builds in front of the camera. The car starts jerking all over the road with no warning. There is no error other than noticing that the car cannot keep itself in the lane. When trying to disable the features, they get turned back on automatically.

Feb 03, 2025

POWER TRAIN,ELECTRICAL SYSTEM,UNKNOWN OR OTHER

2 complaints

2023 Hyundai Ioniq 5 ICCU failed with DTC P1A9096 which renders the vehicle in limp mode once the 12V battery drains. This is a major issue which keeps happening even after severals recalls with software updates related to this problem. When this incident happened i had gotten all the recalls and software updates available for the entire care and still it failed prematurely at 35K miles.

May 12, 2025

ICCU ASSY and Fuse had to be replaced as well as the 12 volt battery which failed a few weeks after. The car lost power on a main road 2/3/25 and we were just able to get into a parking lot. The message to check power supply came on and we lost power immediately. The 12 volt battery failed when I went to pick the car up from the dealership after they worked on the bluelink settings that had to be reconfigured a couple weeks later 2/25/25. I was lucky that I didn't have to be towed that time. I had just got into the car to leave and the warning message came on to check the power supply. My dealer service dept was wonderful. I have absolutely no complaints about them but I am angry that Hyundai is putting these same bad parts in the 2025 Ioniq 5 and we can't trust our car! We love this car and were planning to buy another one but will wait to see if Hyundai does the right thing and fixes this problem.

Mar 10, 2025

ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE

2 complaints

Car had 2 recalls and a diagnostic on 3/12/25. All checked out ok. It has 9,630 miles. 3/19/25 after driving 4 times throughout the day, it would not start or unlock. Roadside assistance jumped the 12v battery and drove it home. Drove it yesterday fully charged and worked. Then it would not start this morning. Dealer advised it was unsafe and to have it towed to dealership because they had another case where person was driving same car on the highway though and the car died. Please advise what my rights are for addressing this safely.

Mar 21, 2025

The car has had multiple recalls for the ICCU failure. I have brought the car in been 3 times. Will go in again this week . The recall remedy never fixes the issue. The car works for a few weeks then the same issue happens again .Unable to start the car or drive . Has been going on since June 2024.

Jan 05, 2025

VEHICLE SPEED CONTROL,SERVICE BRAKES

2 complaints

When parking in a supermarket parking lot I slowly approached the space while braking. As I turned left into the space and released the brake pedal to allow the car to slowly roll into the space as I always do, the car surged as if someone floored the accelerator. I veered left to avoid a head on collision with the parked car facing me and went diagonally between the right front fender of that car and the left front fender of the car parked in the space to my left. I sideswiped both sides of my car and damaged the front fenders of both cars before I was able to apply the brake and bring the car to a stop. There was a mother with her two young children loading groceries into the car in front of me. Fortunately I avoided hitting anyone, but the witnessed the accident. I was in shock. My car suffered $25 in damages. There is absolutely no way I accidentally applied the accelerator, and if I had I would never have floored it! The car malfunctioned. I reported this incident to Hyundai also. They supposedly were sending someone to inspect the car at the auto body repair center.

Jun 18, 2024

Crash: 1

brake lights do not come on when the car is in regenerative braking or driving mode and the driver is touching the gas pedal. Drivers following the car are not aware the car is actually braking not coasting. This is causing a rearending hazard. Mfr needs to correct issues so brake lights come on when car is in regenerative braking mode and the car is deaccellerating regardless of gas pedal activity

May 29, 2023

SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

2 complaints

12/30/2023 at approximately 5:30pm I drove home with the iPedal engaged. The iPedal was installed as a download to the car in August 2023. My daughter was in the passenger seat. I began to back into my driveway but shifted to Drive to straighten out the car. The car began to roll forward I took my foot off the accelerator but the car did not stop in spite of the iPedal being engaged. I put my foot on the BRAKE PEDAL which went all the way to the floor to no avail. The car rolled slowly into an electrical pole which brought the car to a stop. I previously filed a complaint here but I have since learned that iPedal may disengage if the car is put into reverse. There is not warning light to alert the driver that iPedal is disengaged so the driver is not aware that the brakes may not work as expected. I believe this may have been the case with my accident. However, this does not address why using the foot pedal for the brakes did not stop the car. Have found many complaints about this on various forums and believe this aspect of iPedal needs to be addressed. It should not disengage unless the driver instructs the car to do so. I have not been able to find documentation of this functionality in the manual, but I have searched and will continue to do so.

Feb 15, 2024

Crash: 1

12/30/2023 at approximately 5:30pm I drove home with the iPedal engaged. The iPedal was installed as a download to the car in August 2023. My daughter was in the passenger seat. I began to back into my driveway but shifted to Drive to straighten out the car. The car began to roll forward I took my foot off the accelerator but the car did not stop in spite of the iPedal being engaged. I put my foot on the BRAKE PEDAL which went all the way to the floor to no avail. The car rolled slowly into an electrical pole which brought the car to a stop. Neither iPedal nor the foot brake pedal had any effect on the car. I then put the car in reverse and backed the car into my driveway and the brakes worked as expected. When I then attempted to charge the vehicle, the charging port would not open. I could hear the motor working to open but it would not open. On 1/11/2024, I again attempted to open the charging port and this time it did open. So, TWO different electrical (including the brakes and the charging port) were not working properly. Inasmuch as the charging port again worked and the brakes again worked, there clearly was a malfunction that was random and unpredictable and also nearly impossible to reproduce but if this happened once, it could happen again. The brakes failed. Had we been traveling on a busy road, or at the top of a hill, we would have faced significant bodily harm, death to ourselves or others. This car had been driven locally, predominantly on local roads. The car is available for inspection and has only been driven on the dealer lot since the the incident. There were no warning lights or messages to indicate that any issues existed. The manufacturer has executed an inspected but has not reproduced the problem. The manufacturer and dealership claims the car is safe to drive without addressing the brake failure. I do not believe the car is safe to drive without a determination of how the bake failure happened or without a repair to that issue.

Feb 08, 2024

Crash: 1

POWER TRAIN,FORWARD COLLISION AVOIDANCE

2 complaints

Driver was moving forward into a space in a parking garage between two other vehicles. Driver had pulled most of the way in and was slowly inching forward. As the car came to a stop, it suddenly lurched forward, hitting a concrete wall. The collision warning system did not alert, and auto-braking did not occur. The car was in Regen Level 3, and Auto Hold was not activated. In the months prior to this, the car twice had a similar situation when coming to a stop at an intersection with foot on the brake, then suddenly lurched forward, nearly rear-ending a car in front. There was no visible damage to the concrete wall, and a police report was not made. Hyundai says they want to inspect vehicle, but have not done so after a month. It is easy to believe that this was driver error, but it absolutely was not. Car lunged forward and accelerated into a wall with only the brake being applied. All of these events have occurred after the Hyundai Ioniq 5 software update was applied on 26 Sep 2023.

Feb 08, 2024

Crash: 1

Driving on freeway when adaptive cruise control turns off and had a sudden complete loss of acceleration, we had steering and brakes only. Sudden reduction of car speed in traffic could cause accident. Has only happened once in 20k miles. (no acceleration) Adaptive cruise control shuts off for no reason, but dealer couldn't replicate. In recent 8k trip we photographed warning on dash 17 + times after shut down. Dealer couldn't find any saved trouble codes for this. No warnings prior to any occurrence only after, dash turned off on acceleration loss.

Oct 20, 2023

VISIBILITY/WIPER

2 complaints

When driving down the road, road debris and water blind the back windshield. There is no wiper and the design does not clear off the back windshield, causing you not to be able to see out the back windshield. This is causing a safety issue with the vehicle, and I almost had an accident because of it. Additionally, the side mirrors will not clear off water, causing them not to be able to use during rain storms. This vehicle is not safe as is. Hyundai has stated it is a design defect and they won’t do anything about it, per the corp office and the dealership, Jenkins Hyundai in Ocala, Fl

Aug 02, 2023

There is no rear windshield wiper and the design of the car causes much dirt/gunk to build up HEAVILY obscuring visibility There are times where I'm driving at night (esp. when it's raining) where I can barely make out the cars/objects behind me. It is very dangerous

Mar 02, 2023

ELECTRICAL SYSTEM,SERVICE BRAKES

2 complaints

When driving in I Pedal mode (which is the one-pedal mode), the brake lights do not light up when decelerating, and it almost caused us to be rear-ended yesterday. Drivers pull aside me and tell me my brake lights don't properly come on when I slow down. Apparently this defect was on the national news several months ago and Hyundai promised a software fix by mid-July. I was just at the Carlsbad, CA Hyundai Service Center this morning and was told they do not have a software fix for this issue. This car should officially be recalled by Hyundai and the NHTSA and owners should be warned officially they are driving a dangerous, defective car.

Aug 01, 2023

The Ioniq 5 has a braking system that does not engage the brake lights on deceleration when in certain regenerative braking settings. This is dangerous as the car will quickly decelerate and not warn drivers behind you potentially causing a crash because they are unaware the Ioniq is stopping quickly. Please have Hyundai address the issue for recall.

May 28, 2023

EXTERIOR LIGHTING

2 complaints

When my car is configured to one pedal driving mode (iPedal), the brake lights only illuminate when the accelerator pedal is fully released. This means the car may decelerate rapidly (up to 0.25G or 2.5m/s^2 according to a report) under regenerative braking, while the brake lights remain off. I believe this is a safety hazard that can increase the chances of rear-end accidents.

May 26, 2023

While driving in the one pedal driving mode (“iPedal”), it is possible to rapidly slow the vehicle while keeping the accelerator pedal slightly depressed, which is the expected result for this regenerative braking mode. While rapidly decelerating in this mode, however, the brake lights do not illuminate while the accelerator pedal is slightly depressed. Even though regenerative braking is active and the car is rapidly decelerating, there is no brake light illumination. The brake lights only turn on if the accelerator pedal is not pressed at all, which during typical one-pedal driving only occurs at the very end when coming to a complete stop, or when stopping suddenly during a cut-in or at a light. This is a serious safety concern because the vehicle will decelerate very quickly with no visual warning lights to other drivers behind the vehicle. I have noticed that this issue has been reported by other drivers online, but I have not yet taken the vehicle to be inspected by the dealer. There is no indication of failure on the dashboard.

Mar 02, 2023

POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM

1 complaint

While stopped at a stop light, "check electrical system" warning flashed on instrument panel without any prior warning or malfunction. I was only able to move the car about 50 feet before all power and controls failed. I was in a middle lane and was barely able to move the car out of traffic. Tow truck driver with a large jump start battery pack was able to give it enough power for me to crawl it onto their flatbed, my small lithium jumpstart pack was only enough to get the rest of its doors unlocked. Battery temperature was about 30 degrees F, state of charge 75 percent, had been driving from home less than 10 minutes, car had been sitting outside for a few days. Problem diagnosed as ICCU failure by dealer service department, now waiting on replacement part to complete repair.

Jan 28, 2026

ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,ENGINE

1 complaint

My 2023 Hyundai Ioniq 5 suffered a sudden Integrated Charging Control Unit (ICCU) failure that put me in grave danger. As I left my workplace in the evening, I heard a “pop” sound and got the dashboard warning, “Check Electrical Vehicle System.” It was unclear what the warning meant. I had 65% charge left at that point. As I began driving, the gas pedal “stuck,” not allowing me to accelerate past 25 mph, and it felt like the car was dragging. I did not know what was happening. The “Check Electrical Vehicle System” warning returned but gave no indication of whether it was safe to drive or what to check in the electrical system. Driving very slowly, I made it out of the military base (my workplace), parked outside of a closed establishment, and called my husband. He told me to drive further up the road to a well-lit shopping area. I exited the parking lot and entered the intersection of a four-lane highway – and suddenly, when I was in the center about to turn in the direction of traffic, the car stopped and would not respond to the gas pedal. I could not accelerate and was stuck in the middle of the highway. After several frantic pushes on the gas pedal, I was able to coast downward to the shoulder and exit the vehicle. My husband and I had brought the car to the dealer in February 2025 for the December 20, 2024 ICCU recall (NHTSA Recall 24V-868, Hyundai Recall 272). The dealer merely inspected the car and updated its ICCU software. Per Hyundai guidance, it did not replace the ICCU itself. It is taking no apparent steps to do so for 2023 Ioniq 5 owners, leaving us in danger. The seriousness of this problem is compounded by the lack of adequate warning when it occurs out of the blue. The generic “Check Electrical Vehicle System” indicator on the dashboard did not indicate what precisely in the electrical system to check, how serious the issue was, or how much of the 12-volt battery power was left. Hyundai must rectify this issue before others are hurt.

Jan 18, 2026

STEERING,POWER TRAIN,VEHICLE SPEED CONTROL

1 complaint

NHTSA Vehicle Safety Complaint Vehicle Information: Year: 2023 Make: Hyundai Model: Ioniq 5 VIN: [XXX] Mileage: Over 137,000 miles 15 States Driven: AZ, TX, GA, CA, MI (with damage here primarily) Complaint: My 2023 Hyundai Ioniq 5 has experienced persistent and severe safety failures since delivery in January 2023, including: Complete power and control loss at highway speeds Repeated BMS/12V failures (even at 30% state of charge) Nonworking rear brake lights at night for over one year False-alarming and nonfunctional parking sensors Interior wear faster than normal; more These failures have created life-threatening hazards for me and my children, who regularly ride in the vehicle. The vehicle is under an active federal safety recall, which under 49 U.S.C. § 30118–30120 requires dealers and manufacturers to repair recalled vehicles promptly, without regard to profitability or cost. Despite repeated written requests, Pedder Hyundai (Poway, CA) refused to perform recall repairs, obstructed resolution, blocked corporate contact, and threatened to tow the vehicle illegally at my expense within 48 hours, demonstrating reckless disregard for consumer safety and federal law. A police report documenting criminal endangerment, conversion, and aggravated consumer endangerment is pending, and the lender of the vehicle has been notified of breach of contract. These issues appear systemic, affecting multiple vehicles of this model, and have resulted in: Frequent, unexpected towing with surprise expenses and downtime Significant risk of injury or death due to power/control loss Repeated failures despite warranty and recall obligations I request NHTSA investigate immediately, ensure recall repairs are completed promptly, and take any action necessary to protect public safety. Available case file including Dealer correspondence showing obstruction refusal threats to ignore California and federal law INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Oct 16, 2025

ELECTRICAL SYSTEM,AIR BAGS

1 complaint

Airbag wire under driver seat drags on ground

Oct 14, 2025

POWER TRAIN,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL

1 complaint

Vehicle stopped responding to all inputs while cruising on the highway. Vehicle was charged and running fine up until that point, for about 40 minutes of continuous driving. Accelerator pedal, regen paddle shifters, cruise control buttons all would not work and display was unresponsive. Vehicle slowly lost speed as if it was shifted into neutral, forcing us to pull over to the side of the road. Turning vehicle off, waiting for a minute, and turning it back on restored functions. Vehicle malfunction occurred right after a busy intersection on LA highways and we were able to make it to the shoulder, but if it had happened just 1-2 minutes earlier, we would have been in a lot of traffic merging in and out of lanes at significant speeds. There were no warning lights, messages, or auditory alerts during the occurrence. Vehicle simply lost all power. When I took it into the dealer for inspection the next day, the service staff were unable to find any issues or errors during diagnostics. Battery health was in the green and vehicle checked out fine and was released to me after a thorough inspection.

Apr 23, 2025

ELECTRICAL SYSTEM,EXTERIOR LIGHTING,FUEL/PROPULSION SYSTEM

1 complaint

These cars had an open campaign earlier in the year to check for faulty ICCUs. Mine was check in Jan and deemed to be good. In early Feb I was driving home alone late at night and suddenly I was unable to go faster than 20mph and in a matter of minutes the car shut off. It had to be towed and the dealer informed me the ICCU failed. It was very scary and extremely dangerous. This has been happening so often with the Ioniq 5's and there should be a mass recall.

Mar 31, 2025

STEERING,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

1 complaint

The first time the "aux" battery was not charging completely. 2nd time pretty much same issue, they claimed to have performed a software update, 3rd time warning lights came on "Problem, check electrical system" ..something like this. They told me to bring the vehicle to the dealership. After reading the problems stem from the ICCU, I decided to call them to ask if I should tow it in, due to all the warnings. After this we could not even get into the vehicle or drive it. Took us and the tow driver 4 attempts to get it out of the garage, down driveway and it had to be pulled onto the flat bed. They agreed and said that if there were any tow fees, they would pay them. Furthermore they said they would supply a vehicle to use while mine was being repaired. This was on Jan 25th, they still have not returned my vehicle, claiming they are waiting on parts, I've had to call them to check on it, this week NO contact what so ever.

Mar 14, 2025

POWER TRAIN,FUEL/PROPULSION SYSTEM

1 complaint

On [XXX], I was pulling into my driveway when I heard a loud “clunk” and an error message came up on the dashboard saying “Check Electric Vehicle System.” I checked the 12V battery which was at 11.9 volts, so I first tried charging it with an external battery charger. However, the error message still came up, and when I tried driving on my street it was limited to 25 miles per hour, and eventually I got the error “Stop vehicle and check power supply” and the car slowed to a crawl. There was no warning prior to the failure. I had the latest ICCU software update recall performed at Capitol Hyundai in San Jose, CA on December 30, 2024. The next day, I had the car towed to Capitol Hyundai; a week later they diagnosed the problem as a blown fuse and ICCU failure. There is no estimate on when they will receive a new ICCU part to repair it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Mar 01, 2025

ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL

1 complaint

Several days ago, the twelve volt battery on my car was replaced because the car just suddenly died overnight while sitting in my garage. They told me that the battery needed to be replaced when I went to the dealer. They replaced it and now less than a week later, I was driving on the highway and suddenly the car Slowed to no more than 27 miles an hour with warnings about the electrical system not working and a problem with the battery. I had to put my flashers on while I was driving down the highway until I was able to pull off and have the car towed to another dealer that was closer to the scene. Not sure what they are going to say, but obviously this was very scary as well as a nuisance.

Jan 01, 2025

BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE

1 complaint

The rear video camera fails intermittently. It works sometimes and doesn't at times. The same with the rear cross traffic warning and pedestrian warning. I've taken my car to the dealer service center but they claim to not being able to reproduce the issue. I know the issue still exists since my husband hit a parked car while backing out of a driveway since there was no alert provided and the rear camera did not work.

Jan 01, 2025

Crash: 1

SUSPENSION,STRUCTURE,WHEELS

1 complaint

The lower control arm broke off of the subframe during daily commute on the highway, which left the car completely immobilized and had to be towed. The incident could've been a lot worse if I had lost control of the car and swerved into others on the road. vehicle is currently being inspected by Hyundai dealership. Prior to the incident, there were no warning lights or symptoms.

Oct 28, 2024

LANE DEPARTURE

1 complaint

Vehicle disengaged lane keeping ADAS without warning multiple times. Sometimes a warning beep would occur, but often on turns it would suddenly disengage without a beep or any other warning method causing me to have to yank the wheel to complete the turn correctly and avoid running off the road. This has caused me to not trust the system and fight the lane keeping feature just in case it suddenly turns off and goes into the other lane before I have a chance to correct the steering.

Oct 27, 2024

STRUCTURE,WHEELS,UNKNOWN OR OTHER

1 complaint

When approaching 60 mph the vehicle starts to vibrate / shake. Upon a dealer's recommendation they have rotated, aligned, balanced and changed the tires and repaired the rear rims, but they did not help. (Just cost us money). I contacted Hyundai and they suggested that I go to another dealer, which I did. They said it was a known issue and the there is nothing they can do about it. I can't say much about the safety aspect, but I'm sure it's not good when a car vibrates and no on seems to know why ...

Sep 27, 2024

SUSPENSION,WHEELS

1 complaint

Due to an extreme failure in the integrity of the OEM tires, the vehicle experienced violent shaking a speeds in excess of 45mph. The shaking resulted from the extreme unbalanced nature of the wheels due to displaced noise-isolating foam inside the tire. As these tires were installed when the new vehicle was purchased, there is a significant issue with the fact that none of the dealership service stations visited to address this issue could identify a problem. Additionally, all three dealerships refused to work on the tires or help address an obvious problem for a vehicle with only 6,400 miles. While the warranty for the tires lies with Michelin, the complete lack of response or care by Hyundai representatives on a component with such a high failure rate is extremely unnerving and problematic.

Aug 27, 2024

SUSPENSION

1 complaint

Suspension came through the top of casing hitting the hood after going over a minor pothole.

Aug 16, 2024

STEERING,WHEELS

1 complaint

Hyundai Ioniq5 acquired new in September 2023 - mileage at the time of incident 10,800 miles - Michelin Primacy AS 235/55 R19 - OEM tires installed by the manufacturer. Front tire started to go off balance causing steering wheel vibrations and shaking that increased with speed - car was not drivable above 55MPH due to excessive shaking and vibrations of steering wheel - this presents safety concern as it may lead to loss of control and excessive wear and tear on other suspension / wheel components. I took the vehicle to a local tire shop (Town Fair Tire in Norwalk CT - authorized dealer of Michelin tires) - got wheels rotated, balances and alignment adjusted. The issue persisted - on the second visit tire shop dismounted one of the tires and discovered internal foam band unglued and clumped on one side of the tire causing off-balance. The shop recommended removal of the foam material and rebalancing of the tire to correct the manufacturing error. I contacted Hyundai and reported this as a safety issue as well.

Jul 31, 2024

STEERING

1 complaint

Unexpected and uncontrollable shaking of steering while driving at speeds over 40mph

May 10, 2024

SEATS,UNKNOWN OR OTHER

1 complaint

rain day driving bottom cover drop off and so many noise back seat or trunk cover area already fixed 2 times dealer still noise many driver complain

Apr 10, 2024

UNKNOWN OR OTHER,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

1 complaint

I bought my Ioniq 5 in April 2023, starting in June 2023 I started having issues with the internal navigation system locating my vehicle on a different route than I was actually on. When I connect to Apple CarPlay to be able to use Google Maps or Waze, it also throws my cell phone system off and will be taken into wrong streets. Vehicle navigation also detected me driving in the wrong direction alerting me not to enter the street. I took video and photos to the dealer starting in June 2023 for a few months. They first updated the software which took over 6 hours, and my car spent the night at the dealer. Unfortunately it did not resolve the problem, they then replaced the antennae also not resolved issue. They replaced the camera in front of the rear view mirror, also no resolution. Lastly they replaced the head unit under warranty. My car continues to have the same issues with navigation and recently while on the freeway and the navigation and Apple CarPlay were acting up, when i switched lanes it alerted me of a collision and car began to break while driving 65 miles per hour. This could have caused me to be rear ended if there would have been a vehicle behind me. I do not feel safe driving this vehicle which i depend on the navigation maps for my daily work. Currently i am avoiding driving on freeways to ensure the car does not suddenly brake and cause me to be rear ended. I contacted the dealer and they stated they have not detected the same issue on other Ioniq 5's sold at Puente Hills Hyundai in California. In researching through the internet, i found there are others experiencing the same issue. Dealer asked me to bring my car in once again, but i am not sure what they can do. Hyundai needs to figure out the issue on the Ioniq 5 navigation system and issue a recall to fix the safety glitch with the system.

Mar 18, 2024

POWER TRAIN,VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM

1 complaint

The car loses power, slows down dramatically, and will not respond to the accelerator pedal. This failure has happened twice. The first time I was driving at about 40MPH on a side street when the car started slowing down with no warning and limped along at about 20MPH. I could not get it to move faster so I put my flashers on and made my way to the side of the street, pulled off of the road and shut the car off. When I restarted the car it drove normally. I reported the failure to Hyundai and they had never heard of this happening. They kept the car for 2 days and couldn't replicate the problem. That was about 2 months ago. Yesterday, 3/4/24, I was on the freeway going about 74MPH using the smart cruise control. I had just changed lanes when the car lost power and I got the message, "Smart cruise conditions not met." My speed dropped to the low 40's as other cars were whipping past me. Even though I floored the accelerator I got no response. I started the flashers, made my way to the right lane and got off on an exit ramp. I pulled off to the side of the ramp, parked the car and turned it off. Once again, when I restarted the car it performed normally. This is very dangerous! I could have easily been rear ended by another, faster car on the freeway since I slowed down so quickly without braking lights lighting. I brought it back to the dealer again today and they have kept it to run diagnostics. I don't expect that they will find any problem this time either.

Mar 05, 2024

LANE DEPARTURE,BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE

1 complaint

3 issues: 1. 2 x, driving over a hundred miles the sensors get faults. None of the sensors work. Does not detect other cars. They updated my firmware, wiping the faults. 2. Once stopped at stop light, the sensors can start detecting items not there. 3. When parking the car does not detect items that are there. (I have video, dealerships so far refuses to fix) I am still trying to get them to fix it. Additional concern, talking to other drivers, they have similar issues and responses from the Hyundai dealerships. This is for both the Ioniq 5 and 6. Pictures: shows no other car image, or sensor detection. I took the picture a behind to give context. I can provide the videos if needed. Answers to question, separated with a comma: Yes, answered above, trying to get confirmed, the car has been inspected by Hyundai service center, and the errors were wiped by a update + reset.

Mar 02, 2024

UNKNOWN OR OTHER,EQUIPMENT

1 complaint

The navigation system in this car has an additional feature which is always enabled even if a destination is not programmed into the nav system which is supposed to warn drivers if they are going the wrong way on a highway. Intermittently the system erroneously indicates that the driver is going the wrong way. A voice warning is repeated issued and a warning symbol is displayed on the instrument panel. It is shocking, very distracting and frightening at first. Then it becomes a driver irritation, and eventually the driver tries to ignore the constant warnings, completely defeating the purpose of the safety feature. I’ve seen on the Ioniq forums where other drivers have reported this intermittent problem. Our local dealer would not check our car because the nav system was not failing at the time we brought it in. The problem can last for 5 minutes and then stop or can last for a duration of a car trip. For drivers unaware of this problem, they could easily be frightened enough to cause unsafe driving.

Feb 22, 2024

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE

1 complaint

Driving the vehicle on the highway for longer than 60 miles at highway speeds the vehicle goes into “power limited” mode and a turtle pops up on the screen. You are unable to accelerate the car and once this happens you have to leave the car off for at least 5 minutes and then not drive above 65mph again or it will keep happening over and over. After taking it to the shop Hyundai Corporate said we need to drive the car again to see if they had fixed it. Approximately 65 miles into the trip it happened again and this time I was almost rear ended and cars were swerving around me on the shoulder to avoid crashing into me. Hyundai is saying that they cannot reproduce the issue but they are not driving the car on the highway for more than 60 miles. The safety of not only myself and my family is at risk as well as other people on the highway behind and next to us. The vehicle is currently at the dealership and they said there are no error codes so they don’t know what’s wrong. The only warning that popped up said “power limited” with a turtle.

Jan 26, 2024

AIR BAGS,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

1 complaint

The car proceeds by itself and does not stop even when brakes are engaged. This happened 2 times. Once in reverse and once forward, both caused severe damages to the car. In the forward incident, the driver was wearing seat belt but air bags deployed with impact.

Dec 23, 2023

Crash: 1

Injuries: 2

ELECTRICAL SYSTEM,SERVICE BRAKES,BACK OVER PREVENTION

1 complaint

Intermittent Electrical / Brake failure . Put vehicle in reverse . Brakes failed to stop vehicle . Vehicle has had electrical issues before . Waring lights came on for steering and tire pressure in the past . Recall then came from Hyundai for the ICCU .45 minutes before the collision, the front collision warning came on when I was stopped at an intersection with no one in front of me . I stopped the vehicle and turned the vehicle off . Turned on the vehicle and it reset the warning lights and sounds , and I continued to drive . Later while pulling out of a parking space in reverse ,I stepped on the brakes but the vehicle did not stop . I pumped the brakes to no avail . After the collision , the brakes worked again when the tow truck driver placed the vehicle on the flatbed .The Hyundai dealer , after the vehicle had been in their possession for several weeks with the battery disconnected, said there was no problem They also had a factory rep look at the vehicle and he made a report . We have not been able to get a copy of the report . Vehicle is still at the dealership . When notified by the factory rep of their claim that the vehicle had no problems , the vehicle had been out of service more then 30 days .

Dec 19, 2023

Crash: 1

ELECTRICAL SYSTEM,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

1 complaint

The following is an incident that happened yesterday to my wife, who is an experienced driver: Whilst driving south on I5 from Seatac toward Tacoma in heavy rain with surface spray the screen above the steering wheel mentioned collision avoidance was not working and radar was not working. When I applied the brakes to slow down no response from the brakes. I then let off the brake and tried several times to apply the brakes each time with no success. I still had full control of the steering and could still steer the car. This lasted for about 30s then the brakes started working again. The error messages regarding collision avoidance and radar not working would continue to pop up even after the brakes were working. After stopping the car and turning it off and restarting several hours later the car no longer displayed any error messages. No vehicle or passenger were hurt in this incident, however if the traffic had slowed or stopped this outcome could have been very different.

Dec 06, 2023

VEHICLE SPEED CONTROL

1 complaint

When driving my new Hyundai ionic 5, the dashboard display is set up such that when I am in my preferred seating position, and my hands at 10 and 2 on the steering wheel, I cannot see the spedometer reading. I basically don't know how fast I'm going and less I change my hand position or move my head. This requires a fair more amount of time for me to take my attention off the road. This is not an isolated incident. I have asked my friends, who range in height from 5'2 to 6 ft 3 to do the same thing. They all report the same problem when they are in their preferred seating position. I am also noted many complaints about the same issue on the ionic 5 internet boards. This problem is caused solely by Hyundai's choice of a main display layout. This is the way it is laid out from the factory, and there is no way to change the speedometer position on the main display as a user.

Nov 07, 2023

VISIBILITY/WIPER,LANE DEPARTURE,FORWARD COLLISION AVOIDANCE

1 complaint

This car has detailed complaints online for the absence of a rear wiper causing zero visibility during afternoon rain and thunderstorms. In the event of a white out situation, the driver assistance systems fail to work due to hazardous conditions. You also cannot see out of the rear window or side mirrors because of a design defect. The car has been reported to Jenkins Hyundai of Ocala, where the service department is aware and informed me that Hyundai is aware of the safety concerns, but cannot fix the situation or will not offer a fix to the serious safety concern. The service department gave me the phone number to report this as a lemon to Hyundai Customer care where I was informed twice a manager named [XXX] has my case and would contact me, which she has not done. The case number given is [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Jul 28, 2023

EXTERIOR LIGHTING,SERVICE BRAKES

1 complaint

When using the one pedal driving or "iPedal" mode, the brake lights do not illuminate when braking unless your foot is completely off of the accelerator pedal. This is very dangerous because the vehicle can be stopped very hard without completely removing your foot from the gas pedal. I have stopped using this mode after almost being rear-ended three times within a week due to the car behind me not realizing that I am braking. This issue is gaining media attention. After doing research online, I have learned that there are lots of other people that have noticed the same behavior and have stopped using this mode as a result.

Jul 05, 2023

FUEL/PROPULSION SYSTEM,FORWARD COLLISION AVOIDANCE

1 complaint

Cruise control became disabled and then unable to accelerate when pressing down on accelerator

Jun 26, 2023

VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE,LANE DEPARTURE

1 complaint

While driving on the interstate my 2023 Ioniq 5 SEL RWD experienced a failure with the front radar system stating that it was blocked. In reality there was nothing physically blocking the system which was verified on multiple pullovers to check the front of the vehicle. This caused the critical forward safety functions, HDA system, lane change assist functions, regeneration system, and smart cruise control to all be disabled. The car is available for inspection upon request and I have video of the car displaying the fault messages during the trip as it happened on multiple occasions.

Jun 19, 2023

ENGINE

1 complaint

What component or system failed or malfunctioned: Rear electric motor. Specifically the "engine oil pump" that is used to cool the rear motor. The pump does not respond to MCU commands and does not cool the motor. This causes the motor to overheat after about an hour of highway driving causing the motor to provide VERY limited power. How was your safety or the safety of others put at risk: When the above happens the car experiences a delayed throttle, and very little power to accelerate. This occurs while traveling on a highway where you may need to pass, but no longer have the power to do so safely. Has the problem been reproduced or confirmed by a dealer or independent service center: Dealer took the car in and did not properly attempt to reproduce the issue. Then stated that if the car does not produce a DTC then there is no issue. The dealer has since refused to accept the car again. This has been reproduced here: https://www.ioniqforum.com/threads/rear-motor-not-operating-45-min-after-charge.46007/ Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others: No, I have just started the process of reaching out to the manufacture, and if this fails I will be using my states lemon laws. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear: No this issue does not appear to throw any codes, lights, or messages. The dash shows the rear engine producing no power, and the throttle will only show half when pressed to the floor.

Jun 05, 2023

EXTERIOR LIGHTING,VEHICLE SPEED CONTROL,SERVICE BRAKES

1 complaint

The Ioniq 5 when using level 2 regen, level 3 regen, and i-pedal (one pedal driving), does not turn on the break light when decelerating, even if coming to a full stop unless the driver removes their foot completely from the pedal or hits the break pedal. These driving modes allow the driver to perform regenerative breaking almost to a complete stop without turning on the break lights and warning other drivers behind you. With i-pedal specifically, the driver can 100% perform all stop and go traffic maneuvers without using the break and never have the break lights activate. This appears to be the default behavior of all Ioniq 5 vehicles and is controlled via software. The vehicle does not appear to measure rate of deceleration so even if the driver were to decelerate rapidly, the brakes would not activate. This has been extensively demonstrated on youtube and the best video example of this problem can be found here: https://www.youtube.com/watch?v=U0YW7x9U5TQ

May 26, 2023

POWER TRAIN,SERVICE BRAKES

1 complaint

When using the most aggressive braking energy recovery mode in the Hyundai Ioniq 5 (i-Pedal), the brake lights do not illuminate despite the aggressive nature of the braking provided by this mode. This mode brings the car to a full and complete stop and is very similar to commanded braking via the brake pedal. When using the L1-L3 braking energy recovery modes, the deceleration experienced by the car is more or less mild enough that it would be similar to a downshift in a manual transmission car. But the brake lights only illuminate if your foot is fully off the accelerator pedal. I am not aware of the regulations or SAE guidance to know if this is consistent with best practice, but it could be better with the brake light coming on once a certain deceleration (x m/s2) is reached. It is my opinion that a software change in the car's ECU could effect a fix for this. A mandatory recall would force the issue with Hyundai to actually do something about it. Note that Kia and Genesis share the same basic EV platform and may share the same logic fault in brake light activation. Here is a Youtube video that discusses the issue in a fair level of detail - https://www.youtube.com/watch?v=U0YW7x9U5TQ

May 25, 2023

EXTERIOR LIGHTING,VEHICLE SPEED CONTROL

1 complaint

The Ioniq 5 offers a multi-level regenerative braking system, which slows the car down to varying degrees when letting off the accelerator pedal. While these systems work well to increase efficiency, the behaviour of the brake lights while in use is concerning. Very often the car is slowing considerably, enough to be akin to light braking, but the brake lights do not activate. This can be full let off the accelerator pedal and slowing with not brakes, or with a partial lift (especially on higher regen levels), where the vehicle is obviously slowing but the brake lights do not activate. This has been talked about on various forums and some review videos, and I expect this is not the first complaint placed about this issue. So far it has not caused a problem with my vehicle, but I have had to alter my driving habits to account for this, and it at times renders some of the vehicles technology dangerous to use, despite that technology being added to the car as a benefit to the driver under most conditions.

May 12, 2023

HYBRID PROPULSION SYSTEM

1 complaint

The contact owns a 2023 Hyundai Ioniq 5. The contact stated that the vehicle failed to charge at 120 or 240 volts. The charging unsuccessful alert was displayed. The contact stated that the vehicle only charged on a DC fast charger. The vehicle was taken to the dealer where it was diagnosed that the ICCU (Integrated Charging Control Unit) that allowed both high-voltage and secondary batteries in vehicles to be charged had failed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 500.

Apr 20, 2023

ELECTRICAL SYSTEM,EXTERIOR LIGHTING,SERVICE BRAKES

1 complaint

When using i-Pedal (one-pedal driving) mode in this vehicle, it can decelerate at a very fast rate but does not illuminate the brake lights unless the driver’s foot is completely off the pedal. For example, I can be driving 60mph and decelerate to ~2mph as quickly as other drivers coming to a complete stop, but my brake lights will not illuminate until my foot is **completely** removed from the pedal. This is contradictory to the way one-pedal driving works, since coming to a smooth and slow stop requires that you slowly lift off the accelerator pedal, during which the brake lights do not illuminate because your foot is still pressing the pedal (albeit less and less as you come closer to the stop).

Mar 10, 2023

VISIBILITY

1 complaint

Hater does not push out any hot or heated air.

Mar 02, 2023

2023 HYUNDAI Ioniq 5 Problems & Complaints

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