2018 TOYOTA Sienna Problems & Complaints
Real owner complaints and problems reported to the National Highway Traffic Safety Administration (NHTSA). View common issues by component.
63
Complaints Reported
Complaints by Component
UNKNOWN OR OTHER
10 complaints
Power Sliding Door Cable broke but not covered on current service bulletin POL19-02 dated 06/19/2019 The door affected is the passenger sliding door on the drivers side of the vehicle.
Feb 17, 2025
Driver side automatic sliding door won’t stay open , upon opening and reach all the way , it will quickly close. My child safety is a big concern.
Sep 01, 2021
WE RECEIVED A SAFETY RECALL NOTICE FROM TOYOTA FOR A DEFECTIVE LOW-PRESSURE FUEL PUMP ON OUR 2018 TOYOTA SIENNA. BUT THE DEALERSHIP, FOWLER TOYOTA OF TULSA, WOULD NOT REPLACE THE RECALLED PART FREE OF CHARGE BECAUSE OF THE VEHICLE BEING CONVERTED BY A NON-AUTHORIZED MOBILITY CONVERSION COMPANY. SO FAR THE VAN HAS NOT MALFUNCTIONED BUT FEEL LIKE THE RECALLED PART SHOULD BE REPLACED. CONSUMER CONTACTED THE MANUFACTURER BUT HAS NOT RECEIVED A RESPONSE. OUR COMPANY, BRIGHTER DAY, INC., PURCHASED THE VAN FROM AFFORDABLE MOBILITY SOLUTIONS AND IT WAS CONVERTED FOR WHEELCHAIR ACCESSIBILITY BY ASSISTED TRANSPORTATION SYSTEMS. I CALLED & SENT AN EMAIL TO ATS BUT HAVEN'T RECEIVED ANY RESPONSE. PLEASE RESPOND AT YOUR EARLIEST CONVENIENCE. THANK YOU, [XXX] ~ FLEET MANAGER BRIGHTER DAY, INC. [XXX]*DT INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
Mar 10, 2021
THERE IS A RECALL NOTICE ON MY VAN AND TOYOTA HAS NO SOLUTION FOR IT AS OF YET AND IT IS CAUSING ME TO BE UNABLE TO RENEW MY REGISTRATION ONLINE AND I WILL NOW HAVE TO PAY A LATE FEE. *TR
Jun 08, 2020
I AM UNABLE TO PAY MY RENEWAL REGISTRATION FEE BECAUSE THERE IS NO AVAILABLE REMEDY FOR THE RECALL ON MY VEHICLE YET. I AM NOT SURE WHAT TO DO AT THE MOMENT. THE DMV TOLD ME TO CONTACT MY DEALER. BUT MY DEALER RESPONDED BY STATING THAT THERE IS NO REMEDY TO FIX THE VEHICLE YET. THE DEALER SAID THAT I SHOULD NOTIFY THE DMV SO THAT THEY COULD INVESTIGATE FURTHER AND ALLOW ME TO PAY MY DUES. THIS CURRENT COVID-19 PANDEMIC HAS MADE IT DIFFICULT FOR ME TO GET IN CONTACT WITH THE DMV. *TR
May 22, 2020
+ 5 more complaints for this component
POWER TRAIN
7 complaints
Transmission Whine and Hesitation. Low gear it will hesitate from stop. Know issue with this transmission. There should be a recall on all ua80 transmissions.
Aug 04, 2025
Whining sound coming from vehicle while in drive and accelerator is depressed. Confirmed by dealership that the transmission is failing and needs replacement.
Apr 26, 2025
This is a reoccurring issue on numerous occasions but the transmission programming is a danger to drivers when it is in economy mode (the default setting when car starts up). The transmission constantly starts at a higher gear (3rd or 4th) and reduces throttle input from a stop. It makes for a slower takeoff when making a right turn on the stop sign because the engine would be lugging. Similarly when trying to overtake or merge lanes and you try to speed up the vehicle, the car does not want to downshift. The above mentioned problems are not there when eco-mode is disabled or the car is put into sport mode.
Jul 30, 2024
There has been a "whining" noise or "hum" upon acceleration noticed for several months to a year, could be longer, but getting worse over time. There is also a delay when pressing on gas for the vehicle to actually accelerate. I have had many instances where I am almost hit from behind because of this delay. Obviously the person's behind me have been following me entirely too closely, but nonetheless, scary. This is our primary vehicle for our family, which carries 4 precious boys. I am aware of the CSP already in place for this issue but have been told that my specific vehicle does not qualify for the customer protection program. That seems very odd given the amount of vehicle's listed as "affected"(83,700) sienna's and 66,500 highlanders. You cannot tell me that there are not more out there like mine that are having the SAME problems but being told "not covered". I do not think anyone should have to drive a vehicle with children in it that you are unsure when your transmission is just going to go out or fear getting hit from behind because of the delay in acceleration. Please please do something about this in order to hold toyota accountable!
Apr 05, 2024
The contact owns a 2018 Toyota Sienna. The contact stated while driving at an undisclosed speed, the vehicle hesitated while accelerating. Several unknown warning lights were illuminated. Additionally, the "Pull Over - Take to Dealer" message was displayed. The vehicle was taken to the dealer, where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not included in Customer Support Program: ZJC (Coverage for UA80 Transmission). The failure mileage was approximately 132,000.
Mar 24, 2023
+ 2 more complaints for this component
FUEL/PROPULSION SYSTEM
7 complaints
Hi, I’d like to report a serious issue with my 2018 Toyota Sienna related to the recent fuel system recall. Since the repair, the vehicle has leaked all of its gasoline not once, but three separate times. One of those times, my family was inside the vehicle, and the smell of gas was overwhelming. The car wouldn’t start, and it was clearly an unsafe situation. Now the dealership is charging me $1,400 to replace the fuel pressure hose and clamp, which, after thorough research and review, appears to be directly related to the process they followed when replacing the recalled fuel pump. I’ve also tried contacting the service manager, but I haven’t received a call back. That’s why I’m now requesting that Toyota open a formal case to investigate this properly. I believe this repair should be covered, and I’m asking for support from Toyota directly.
Jul 11, 2025
When accelerating, both from a stop and/or at speed, there is a definite hesitation. When gas pedal is pressed down, there is a noticeable pause before acceleration begins. This causes safety issues especially when accelerating to merge with moving traffic. Have owned this van since Oct 2021, and it has always been an issue. Possible fuel filter problem. Have not reported issue to dealer. Currently under extended warranty.
Jan 22, 2024
The fuel line under the intake ruptured when I started my car on 2/21/23. The repair shop said they had never seen one fail like this. I do not have the parts. I was fortunate to be at home and that the engine wasn't hot when this happened so there was no fire. I had an issue starting the car ~ 1 month before that, but I don't know if the issue was fuel related. The car had been sitting for 1 week prior to that issue.
Feb 28, 2023
Car stalled, sputtered and died. At first, I thought I was out of gas. After several tries, the car started and went 3 miles to gas station. After getting gas, the car wouldn’t start several times and that same day the check engine light came on. We took it to Autozone to check the code and they said it was showing fuel pump failure. Today I’m taking it in to the dealer for service. It has started and run twice since the initial episode.
Jul 19, 2022
WE RECEIVED NOTICE FROM TOYOTA OF A POSSIBLE FAILURE IN THE VEHICLE'S FUEL PUMP FOR WHICH THERE IS NO CURRENT FIX AVAILABLE. THE VEHICLE IS PARKED IN THE GARAGE. NOTHING HAPPENED. MY CONCERN IS THAT THERE'S NO DATA AVAILABLE ABOUT THE FREQUENCY OF THESE FAILURES, SO IT'S IMPOSSIBLE FOR ME TO ASSESS THE RISK OF DRIVING OUR ONLY CAR. *TR
May 10, 2020
+ 2 more complaints for this component
AIR BAGS
4 complaints
The contact owned a 2018 Toyota Sienna The contact stated while driving 70 MPH, the contact was rear-ended and the vehicle lost control and the vehicle rolled over multiple times and fell into a ditch. The contact stated that the side air bags did deploy but the front air bags did not deploy vduring the accident. Medical attention was given to the contact and her family in which they were transported to the local emergency room. The contact stated she and her family suffered injuries the contact stated she had bruised ribs a contusion to her hip and her shoulder and a bruised lung. The contact daughter suffered a concussion neck and shoulder and was diagnosed with manubrium in her back. The contact son suffered a concussion contusion on his abdomen and neck. The contact spouse suffered an injured wrist finger injury and possibly broken ribs and all of the family suffered from whiplash. A police report was filed. The vehicle was towed to a local towing company and the vehicle was released to the insurance to be sent to CO-part. The dealer was contacted and the vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 117,000.
Jun 26, 2024
The contact owned a 2018 Toyota Sienna. The contact stated while driving at 74 mph, a deer ran across the freeway, and as a result, the contact crashed into the deer. The air bags failed to deploy. A police report was filed. The contact sustained a sore shoulder but did not require medical treatment. The was not drivable and was towed back to their home address. The vehicle was not diagnosed or repaired. A dealer was contacted and informed the contact that they would run tests on the air bag once the vehicle was fixed. The manufacturer had not been informed of the failure. The failure mileage was 60,000. The VIN was unavailable.
Jul 01, 2021
When turning left in a busy intersection, our van was struck by another vehicle on the front passenger corner of the car. The strike occurred with my van going about 10 mph, the other car going about 45 mph. All of the airbags deployed. When the airbags deployed, the coverings on the lights came off and the small lightbulb and silver casing projected out, scratching my son's arm. Nothing in the vehicle should break or become a projectile when the airbags deploy. I am not certain on the last few questions.
Jun 07, 2021
TAKATA RECALL (?) WE PURCHASED THIS VAN ON 4/18/2019, PREVIOUSLY THE VAN WAS A RENTAL. THE NEXT EVENING, GOING TO DINNER ON A FRIDAY NIGHT ABOUT 9 P.M. I WAS ON A 2 LANE ROAD IN A RURAL AREA, TRAVELING AT 60 MPH AND A DOG WALKED IN FRONT OF ME. I HAD NO TIME TO REACT. THE FRONT END OF THE VAN WAS LAYING IN THE ROAD, NOT DRIVABLE. AGAIN, A FRONT END COLLISION AND NO AIR BAG DEPLOYMENT! 2ND TOYOTA SIENNA, FIRST A 2017 AND NOW A 2018, BOTH RENTAL SALES, BOTH HAD FRONT END COLLISIONS AND BOTH HAD NO AIR BAG DEPLOYMENT. AT 60 MPH THERE'S NO REASONABLE EXCUSE FOR NO AIR BAG DEPLOYMENT.
Apr 30, 2019
FUEL SYSTEM, GASOLINE
4 complaints
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED WHILE DRIVING 70 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED HOWEVER, THE VEHICLE FAILED TO RESPOND. THERE WAS NO WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER HANLEES DAVIS TOYOTA (4202 CHILES RD, DAVIS, CA 95616, (530)753-3352) HOWEVER, THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE). THE RECALL REPAIR WAS SATISFIED AT MAITA TOYOTA OF SACRAMENTO (2500 AUBURN BLVD, SACRAMENTO, CA 95821, (916)481-0855) HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 52,350. THE VIN WAS INVALID.
Mar 23, 2021
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT AFTER STARTING THE VEHICLE AND EXITING THE DRIVEWAY, THE VEHICLE SURGED FORWARD WHILE IDLE, WITH AN UNKNOWN WARNING LIGHT ILLUMINATED. THE CONTACT THEN RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PART TO DO THE RECALL REPAIR WAS UNAVAILABLE. NORTH BAKERSFIELD TOYOTA (19651 INDUSTRY PKWY DR, BAKERSFIELD, CA 93308, (661) 615-1100) WAS CONTACTED AND CONFIRMED THAT PARTS WERE NOT YET AVAILABLE FOR THE RECALL REPAIR. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS 2,000. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.
Jun 30, 2020
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PART TO DO THE REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.
Jun 04, 2020
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PART TO DO THE RECALL REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER HAD EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. ALAN JAY TOYOTA (404 US HWY 27 N, SEBRING, FL 33870) WAS CONTACTED AND CONFIRMED THE PART WAS NOT AVAILABLE. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. VIN TOOLS CONFIRMS PARTS NOT AVAILABLE. *TR
May 11, 2020
ELECTRICAL SYSTEM
3 complaints
Odometer Fraud. The contact purchased a 2018 Toyota Sienna. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 57,000, and at the time of registration, it was discovered that the mileage was 175,152.
Jun 04, 2025
APPEARS ALL THE TIME THE TIRE PRESSURE WARNING LIGHT .
Mar 19, 2021
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 20 MPH, THE MASTER WARNING LIGHT ILLUMINATED AND THE VEHICLE STALLED. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. AN UNKNOWN DEALER WAS NOTIFIED OF THE FAILURE. THE MANUFACTURER WAS NOT NOTIFIED. THE CONTACT WAS INFORMED THAT THE VIN WAS INCLUDED IN THE NHTSA CAMPAIGN NUMBER: 20V012000 (ELECTRICAL SYSTEM) HOWEVER, THE PART TO DO THE RECALL REPAIR WAS NOT YET AVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER HAD EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE CONTACT STATED THAT THE VEHICLE EXPERIENCED THE FAILURE LISTED IN THE RECALL. VIN TOOL CONFIRMS PARTS NOT AVAILABLE. THE FAILURE MILEAGE WAS 56,000. *BF CONSUMER STATED DEALER FIXED THE PROBLEM BY REPLACING THE TANK FUEL PUMP.*JB
Jun 29, 2020
STRUCTURE
3 complaints
The front passenger side bumper snap(s) comes undone, by air flow, as vehicle travels down the road - this causes further tearing of the supporting plastic frame. Local Toyota dealership says this initially was caused by a driver of the vehicle hitting a concrete curb. Note: Bottom of the bumper is only 8 inches from ground surface. The safety issue is: the bumper and its supporting plastic frame will eventually break and fall off vehicle while in transport. I have witnessed this several times on other vehicles (especially on Toyota's). Dealer compounds problem by saying entire bumper has to be replaced at high cost to customer. Customer delays repair (as I have). This causes further damage to the supporting plastic frame. I have gone from one snap to several snaps in duration. I sent Corporate Toyota a complaint - Essentially, they said they would not do anything .
Jul 03, 2021
THE AUTOMATIC SLIDING DOORS DO NOT HAVE AN AUTO/EMERGENCY STOP IF SOMETHING IMPEDES THEIR SHUTTING. A CHILD CAN GET CRUSHED IF AN ADULT IS NOT THERE TO STOP THE DOORS. EVEN THOUGH I WAS THERE IT WAS VERY HARD FOR ME (AN ADULT) TO STOP THE DOORS FROM CLOSING. YES, THE CHILD WAS WRONG FOR PUSHING THE CLOSE BUTTON THEN REACHING BACK IN THE VAN TO RETRIEVE SOMETHING. HE THOUGHT IT WOULD STOP UNTIL HE WAS DONE. THANKFULLY I WAS STANDING BESIDE HIM AND WAS ABLE TO PULL HIM AWAY BUT THE DOOR STILL CAUGHT MY ARM AND I HAD TO PUSH REALLY HARD TO STOP IT. IT JUST HAPPENED SO FAST. THE VEHICLE WAS STATIONARY, IN PARK, AND THE IGNITION WAS SWITCHED OFF.
Sep 18, 2018
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT THE CARPET ON THE DRIVER SIDE NEAR THE ACCELERATOR AND BRAKE PEDALS WAS LOOSE AND MADE CONTACT WITH THE DRIVER'S FOOT WHILE DRIVING. THE VEHICLE WAS TAKEN TO CAIN TOYOTA (6527 WHIPPLE AVE NW, NORTH CANTON, OH), BUT THE FAILURE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 4,700.
Aug 31, 2018
ENGINE
2 complaints
The contact owns a 2018 Toyota Sienna. The contact stated while driving at an undisclosed speed, the vehicle jerked and lost motive power. In addition, the contact stated that on several occasions the vehicle shut off independently. The vehicle was taken to the dealer; however, the failure could not be duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. In addition, the contact stated that the vehicle was taken to the dealer several times due to the failure. The contact stated that the failure began in 2019 but had become a persistent failure. The contact stated the vehicle was repaired under of an unknown recall and the fuel pump was replaced in 2020; however, the failure reoccurred. The manufacturer was not made aware of the failure. The failure mileage was unknown.
Sep 09, 2024
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. WHILE DRIVING AT LOW SPEEDS MAKING A RIGHT TURN THE OIL WARNING INDICATOR LIGHT ILLUMINATED AND CONTACT NOTICED THE OIL WAS LOW. THE VEHICLE WAS TAKEN TO MECHANICSVILLE TOYOTA 6546 MECHANICSVILLE TURNPIKE, MECHANICSVILLE, VA 23111(804) 559-8000 WHERE IT WAS DIAGNOSED THAT THE OIL WAS LOW AND ADDITIONAL OIL NEEDED TO BE ADDED.THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS CONTACTED BUT NO FURTHER ASSISTANCE WAS PROVIDED. THE FAILURE MILEAGE WAS 3,700. THE VIN WAS NOT AVAILABLE.
Jan 23, 2020
SEATS
2 complaints
TL* THE CONSUMER OWNS A 2018 TOYOTA SIENNA. THE CONSUMER STATED WHILE THE VEHICLE WAS AT A STAND STILL, WHEN ALL FOUR REAR DRIVER AND PASSENGER SEATS BEGAN TO MOVE INDEPENDENTLY FORWARD. THE VEHICLE WAS TAKEN TO LOCAL DEALER AUTONATION TOYOTA HAYWARD LOCATED AT 24773 MISSION BLVD, HAYWARD, CA 94544, WHERE IT WAS DIAGNOSED WITH NEEDING FLOOR RAIL CAPS TO BE REPLACED. THE VEHICLE HAD BEEN REPAIRED TWICE BUT CONTINUES TO EXPERIENCE THE FAILURE. THE MANUFACTURER HAD BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS 1,000. *DT *AS
Mar 18, 2020
I HAVE A QUESTION REGARDING VEHICLE SEAT MOVEMENT. I HAVE BEEN TOLD BY TWO DEALERSHIPS THAT THE SEATS IN THE THIRD ROW OF THE TOYOTA SIENNA ARE MEANT TO HAVE SOME PLAY TO THEM. MY MAIN CONCERN IS THAT WITH A COUPLE OF CAR SEATS IN THE THIRD ROW, OR A COUPLE OF PASSENGERS, THE MOVEMENT OF THE SEATS MAY BE AN ISSUE. ALL FOUR SEAT LATCHES ROTATE WHEN LIFTING ON THE SEAT BY HAND, ALLOWING THE SEAT TO TWIST, MOVE TO THE REAR OF THE VEHICLE AND MOVE LATERALLY. THIS WOULD BE LESS OF A CONCERN IF THE SEATS THEMSELVES WERE NOT THE MOUNT FOR THE LATCH SYSTEM AND SEAT BELTS. MY QUESTION IS, WHAT MOVEMENT IS ALLOWED OF THESE SEATS? IN AN ACCIDENT, A HUGE AMOUNT OF FORCE CAN BE EXERTED ON THESE LATCHES, AND IF THEY ALLOW PLAY, THAT FORCE CAN BE MULTIPLIED BY THAT MOVEMENT. THE INCREASE IN FORCE COULD POTENTIALLY CAUSE THE LATCHES TO FAIL. CURRENTLY THERE IS NO SAFETY TEST FOR THIRD ROW OCCUPANTS OR REAR END COLLISIONS, FROM WHAT I HAVE RESEARCHED. THE ATTACHED FILES SHOW THE ACCESSIBLE LATCHES, AND THEIR MOVEMENT WHEN FORCE IS APPLIED TO THE SEAT.
Nov 08, 2018
POWER TRAIN,VEHICLE SPEED CONTROL
2 complaints
I WAS TURNING LEFT ON COUNTRY ROAD AT 25MPH THE CAR DECELERATE AND YELLOW WARNING CAME ON THE DEALER SAID THE CAR THOUGHT IT WAS GOING TO ROLL OVER THEY DID THE SOFT WARE UP DATE THE CAR STILL DECALRATE YELLOW LIGHT COME ON MOST OF TIME WHEN STARTING UP
May 29, 2019
THE VAN STRUGGLES TO ACCELERATE. THERE IS NO WAY TO TURN OFF ECO MODE. NO BUTTON IS AVAILABLE. VAN STRUGGLES TO GO UP HILLS , EXCELERATE THRU INTERSECTIONS AND ALWAYS HUNTING FOR GEARS OR STUCK IN A GEAR AND SOUNDS AND ACTS VERY HEAVY ON POWER TRAIN END. THERE IS AN OPTION TO TURN OFF ECO LIGHT.TURNING OFF ECO LIGHT DOES NOTHING BUT HIDE THE PROBLEM. WE NEED AN OPTION TO COMPLETE DISABLE ECO MODE WITH UPDATE OR WITH A BUTTON.
Jan 16, 2019
EQUIPMENT ADAPTIVE/MOBILITY
1 complaint
The contact owns a 2018 Toyota Sierra equipped with a Joysceer USA Inc, Hand Control Unit. The contact stated that while operating the vehicle, the message advising to "Stop immediately" was displayed with the error code: 4209 BSM. The contact stated that later a second error code: 1069 SAM was displayed. The contact stated that the messages were due to a malfunction of the Hand Control Unit. The cause of the failures was not yet determined. The manufacturer and installation facility were contacted regarding the failure, but no response was provided. No identifying information was available for the equipment. The failure mileage was 2,000.
Jun 14, 2024
ELECTRICAL SYSTEM,UNKNOWN OR OTHER
1 complaint
I am an owner of a 2018 Toyota Sienna LE. The Vehicle has an issue with the safety connect system. Dealer first states that the cause is the data handling being off, called Toyota turned it on and waited for a few days and still did not work. Called Dealer to make an appointment for service, dealer advised that they reset the DCM twice and to wait 24-48 hours to see if it works. It still does not work. No lights present on the overheard place where the SOS Safety connect Button is located.
Feb 23, 2024
ELECTRICAL SYSTEM,AIR BAGS,ENGINE
1 complaint
N
Sep 04, 2023
VISIBILITY
1 complaint
The contact owns a 2018 Toyota Sienna. The contact stated that while driving at approximately 70 MPH, the sunroof glass exploded without impact while closed. No warning lights were illuminated. The vehicle was taken to a local dealer, where it was diagnosed that the sunroof glass needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 58,634.
Apr 17, 2023
CHILD SEAT
1 complaint
The contact owns a Baby Trend car seat, Model Number: CS661232H-SB-00137, Manufactured Date: 07/05/2021, installed in a 2018 Toyota Sienna. The contact stated that the buckle handle on the left was hard to operate. The contact also stated that the harness connection was defective. The manufacturer was notified of the failure and informed the contact to send the car seat back; however, the contact stated she needed a temporary replacement car seat. The car seat was not repaired nor replaced.
May 23, 2022
POWER TRAIN,STRUCTURE,SEATS
1 complaint
The last week of September 2021 my husband notice a sound like water runing and a leak on the driver and passenger seats, we take the vehicle to the Dealer for an inspection on October 2nd. They said the AC hose was clogged for a spiderweb and the leak can create a mold. This mold can affect my family health. We informed to the insurance and we taked the vehicle to the Dealer for repair. They did an expensive special cleaning to Remove the mold, and disamble my entire vehicle, the worse is my vehicle still unassembled after 3 months at the dealership. All this happens with out any warning sign, symptoms or light. This vehicle is 3 years old and all services on time and by the same Dealership. My vehicle has a lot of technology but not warning about this AC clogged and damage my entire vehicle wich still on repair.
Jan 25, 2022
VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM
1 complaint
I HAD TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID CONTROL CIRCUIT AND WHEN I RICH 85 SPEED THE CAR CHECK AND MY FRIEND HAVE THE SAME CAR SAM MODEL HE HAD THE SAME ISSUE
Feb 27, 2021
UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM
1 complaint
MOBILITY WORKS SOLD ME A CAR,THAT HAD A RECALL,DESIGNED FOR SPECIAL NEEDS,THEY KNEW AVOUT IT PLUS THE RAMP WASNT WORKING PROPERLY,MADE ME PAY FOR AN EXPENSIVE WARRANTY THAT DOESNT COVER THE PROBLEM THAT ALREADY HAS,THEY ARE BLAMING ME FOR MISUSE I GOT IT 4 MONTHS AGO MY SON DOESNT WEIGHT MORE THAN 100 POUNDS
Feb 01, 2021
STRUCTURE,UNKNOWN OR OTHER
1 complaint
POWER DOOR CABLE BROKE,DOOR DOES NOT OPEN
Oct 29, 2020
WHEELS
1 complaint
ORIGINAL TIRES AT 17K, MY 2018 SIENNA IS SHOWING EXCESSIVE WEAR ON THE OUTSIDE OF THE FRONT TIRES. ALIGNMENT CHECKED, IT IS FINE.
Oct 16, 2020
SERVICE BRAKES
1 complaint
LIGHT, MODERATE TO TOO MUCH VIBRATION ON THE FRONT BRAKE WHEN DRIVING DOWNHILL. I WAS DRIVING DOWNHILL AND I FELT MODERATE VIBRATION ON THE FRONT BRAKE. I WAS SO SCARED THAT I HAVE TO RELEASE THE BRAKE HOPING TO STOP THE VIBRATION. ON THE WAY BACK HOME, I HAVE TO DRIVE ANOTHER DOWNHILL AND THIS TIME, I FELT TOO MUCH VIBRATION ON THE FRONT BRAKE WHEN I APPLIED THE BRAKE. THE VIBRATION WAS TOO MUCH THAT EVEN THE HOOD, I FEEL LIKE IT STARTS VIBRATING AS WELL. WHEN DRIVING FLAT, THE VIBRATION WILL FADE AWAY OR THERE IS NO VIBRATION AT ALL.
Aug 16, 2020
VEHICLE SPEED CONTROL
1 complaint
UNINTENDED ACCELERATION WHILE REVERSING VEHICLE. VAN WENT FULL THROTTLE AND SPED UP IN REVERSE WHILE BACKING UP FROM MY DRIVE WAY AT HOME. *TR
Jun 05, 2020
SUSPENSION
1 complaint
THE VEHICLE HAS BEEN WEARING TIRES DOWN UNEVENLY TO THE POINT STEEL BRAID BECOMES EXPOSED. IT HAS HAD 3 SETS OF TIRES IN LESS THAN 2 YEARS. IT HAS BEEN ALIGNED TWICE. THE REAR WHEELS ARE NOT WITHIN SPECS AND ARE FIXED AND IN ADJUSTABLE. TOYOTA HAS REFUSED TO LOOK INTO THE PROBLEM ANY FURTHER AND HAS STATED THAT IT MIGHT BE HOW THE VAN RIDES. HAVING THE ALIGNMENT OFF CAUSES THE TIRES TO WEAR DOWN TO AN UNSAFE LEVEL AND IT AFFECTS VEHICLE HANDLING AND PERFORMANCE. *TR
May 29, 2020
TIRES
1 complaint
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA EQUIPPED WITH FOUR BRIDGESTONE TURANZA TIRES, SIZE: 235/55/18 (NA). THE CONTACT STATED THAT THE INSIDE SHOULDER OF EACH TIRE EXPERIENCED SEVERE WEAR. THE VEHICLE WAS TAKEN TO MY AUTO IMPORTS TOYOTA (1860 EAST STERNBURG RD, MUSKEGON, MI), BUT THE CAUSE OF THE FAILURE COULD NOT BE DETERMINED. THE TIRE MANUFACTURER WAS NOT NOTIFIED. THE TIRE AND VEHICLE FAILURE MILEAGE WAS 30,000.
Nov 25, 2019
POWER TRAIN,VEHICLE SPEED CONTROL,SERVICE BRAKES
1 complaint
TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. WHILE DRIVING APPROXIMATELY 45-50 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED, BUT FAILED TO RESPOND. ADDITIONALLY, THE VEHICLE DECELERATED INDEPENDENTLY ON OCCASION. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. LARRY H MILLER TOYOTA COLORADO SPRINGS (LOCATED AT 5115 NEW CAR DR, COLORADO SPRINGS, CO 80923, (719) 419-5832) WAS NOTIFIED OF THE FAILURE. THE CONTACT STATED THAT THE FAILURE RECURRED ON SEVERAL OCCASIONS. THE MANUFACTURER WAS NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 10,000. THE CONSUMER STATED THE WHILE BACKING OUT OF A PARKING SPACE, THE VEHICLE SUDDENLY STOPPED REVERSING AND THE ENGINE BEGAN TO REV UP AS IF THE GAS PEDAL WAS BEING DEPRESSED. THE VEHICLE WAS PUT INTO PARK AND BACK INTO REVERSE. THE ISSUE RESOLVED ITSELF. THE BRAKING SYSTEM WOULD SHUTTER WHEN IN SNOW OR ICE CAUSING THE VEHICLE TO VIBRATE VIOLENTLY AND LOSE TRACTION. *JS
Mar 04, 2019
ELECTRICAL SYSTEM,SEATS
1 complaint
3RD ROW POWER SEATS ARE MALFUNCTIONING AND ARE OPERATING WHILE VEHICLE IS IN MOTION. MULTIPLE TIMES, AND ON DIFFERENT DAYS, THE POWER SEATS HAVE STARTED TO CLOSE WHILE PASSENGER IS SEATED AND BUCKLED IN THE SEAT. OCCURRED TODAY WHILE ON THE HIGHWAY, AT HIGHWAY SPEED WHILE MY WIFE WAS SEATED IN THE DRIVERS SIDE 2 SEAT SPLIT. THE SEAT STARTED TO CLOSE ON ITS OWN - NO ONE TOUCHED ANY BUTTON AND WE HAD BEEN DRIVING FOR OVER AN HOUR. THE SEAT PUT PRESSURE ON HER UNTIL IT STOPPED IN A PARTIALLY CLOSED POSITION. THE SEAT BUTTONS THEN DID NOT WORK TO REOPEN THE SEAT BACK FOR SEVERAL MINUTES. THIS WOULD BE EXTREMELY DANGEROUS FOR A SMALL CHILD. THIS HAS HAPPENED IN A SIMILAR SCENARIO ON MULTIPLE OCCASIONS AND WE ARE CERTAIN THAT THE POWER SEATS ARE MALFUNCTIONING.
Feb 21, 2019
POWER TRAIN,ENGINE
1 complaint
MY 2018 SIENNA LE IS EXPERIENCING ACCELERATION PROBLEMS. I HAD THE SOFTWARE UP DATED BUT AFTER APPROXIMATELY 1,000 MILES THE PROBLEM IS RETURNING. THIS PROBLEM IS ESPECIALLY UNSAFE WHEN MERGING ONTO THE HIGHWAY.
Sep 26, 2018
EXTERIOR LIGHTING,INTERIOR LIGHTING
1 complaint
I RENTED A 2018 TOYOTA SIENNA ON A RECENT TRIP TO HAWAII. UNLIKE EARLIER SIENNA MODELS (WHICH HAD BOLDER, THICKER LABELS FOR THE INDICATORS), THE INSTRUMENT PANEL WAS VERY FAINT AND HARD TO READ IN DAYLIGHT. IN SHADE, IT WAS ALMOST INVISIBLE. I CHECKED THE MANUAL TO SEE IF I COULD TURN THE BRIGHTNESS UP, BUT IT APPEARS TO HAVE BEEN DESIGNED THIS WAY. I'M CONCERNED THAT NOT BEING ABLE TO SEE THE INSTRUMENT PANEL TO OBSERVE SPEED OR OTHER INFORMATION COULD CAUSE AN ACCIDENT, ESPECIALLY IF YOU HAVE TO TAKE YOUR EYES OFF THE ROAD BECAUSE IT'S SO HARD TO READ. IT'S ENOUGH TO MAKE ME NOT BUY THIS CAR, BECAUSE IT MADE ME FEEL VERY UNSAFE IN DRIVING.
Feb 23, 2018
VISIBILITY/WIPER
1 complaint
DRIVING ON 1-75 AND SUNROOF EXPLODED. GLASS ALL OVER OUR DOG IN THE BACK. NO TRAFFIC AROUND US THANK GOD. VAN IS 3 DAYS OLD. TOOK TO DEALER IN FLORIDA AFTER DUCT TAPING AROUND HOLE. TOLD IT WAS HIT BY SOMETHING. WE DID NOT HEAR ANYTHING BUT MY CONCERN IS IF WE AROUND ANY TRAFFIC WE MAY NOT BE HERE ANYMORE. HELL OF A NOISE CAUSING ME TO SWERVE. LUCKY NO ONE WAS THERE. TOTAL BILL 1690.85. I AM A FORMER TOYOTA DEALER FROM ONTARIO CANADA. SCARED THE YOU NO WHAT OUT OF US.
Jan 10, 2018
Frequently Asked Questions
How many problems does the 2018 TOYOTA Sienna have?
The 2018 TOYOTA Sienna currently has 63 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 2018 TOYOTA Sienna?
The most common problems reported for the 2018 TOYOTA Sienna 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 2018 TOYOTA Sienna problem data come from?
All problem and complaint data for the 2018 TOYOTA Sienna comes directly from the National Highway Traffic Safety Administration (NHTSA) database. These are real complaints submitted by actual vehicle owners.
Other Years - TOYOTA Sienna
2025 Problems
2024 Problems
2023 Problems
2022 Problems
2021 Problems
2020 Problems
2019 Problems
2017 Problems
2016 Problems
2015 Problems
2014 Problems
2013 Problems
2012 Problems
2011 Problems
2010 Problems
2009 Problems
2008 Problems
2007 Problems
2006 Problems
2005 Problems
2004 Problems
2003 Problems
2002 Problems
2001 Problems
2000 Problems
Other TOYOTA Models
Similar Brands
ST
3,555 models
RS
3,484 models
NC
2,822 models
ND
2,385 models
Z
1,951 models
MOTO
1,583 models
NU
1,189 models
RC
1,122 models