The Mack MD spans 2020–2026 with 17 recorded NHTSA recalls and a 4.0/5 ForCar reliability score. The years to approach with caution are 2025, 2026, 2024 (most owner complaints); the cleanest are 2020, 2021, 2022. It delivers competitive fuel economy and NHTSA-rated safety.
How we score: NHTSA crash-test safety (40%), recall frequency across all years (25%) and the share of owner complaints involving a crash, fire or injury (35%). Based on NHTSA & EPA data — not user reviews.
Overview
The Mack MD is one of the most popular vehicles in its class, produced from 2020 to 2026 across multiple generations.
How to read a Mack MD VIN — every digit explained
Every Mack MD carries a unique 17-character VIN stamped at the factory. Each position is a code — together they spell out where, when and how your car was built. Here's exactly what every digit means.
- WMI (1–3) — country & manufacturer. Tells you it's a Mack and the country it was built in (real Mack codes below).
- VDS (4–8) — model, body style, engine, trim & restraints. The 8th digit is the engine code.
- Check digit (9) — a math check that proves the VIN is genuine.
- Model year (10) — the year it was built (e.g. R = 2024, S = 2025).
- Plant (11) — which factory assembled this MD.
- Serial (12–17) — the unique sequential production number.
- USA1M1
- Canada2M1
Digits 4–17 — the engine code (8th), model-year letter (10th) and plant — follow the universal SAE standard, identical on every car. For the full year-code table (2001–2026), country codes and where the VIN is stamped on your MD, see the complete guide to reading a VIN.
How many recalls does the Mack MD have?
The Mack MD has 17 recorded NHTSA recalls across 2020–2026. Pick a year below to see its recalls — then verify open recalls against your specific VIN.
2026 Mack MD recalls 1
Seat Belts
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2026 Mack MD vehicles. The center bench seat belt assembly may be routed incorrectly.
Risk. An incorrectly routed seat belt assembly may not restrain an occupant as intended, increasing the risk of injury in a crash.
Fix. Dealers will inspect and replace the seat belt assembly as necessary, free of charge. Owner notification letters were mailed June 3, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0478.
2025 Mack MD recalls 2
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Equipment:other:labels
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 MD and Terrapro vehicles. The Gross Axle Weight Rating (GAWR) listed on the vehicle certification label is incorrect, which can allow the vehicle to be overloaded. As such, these vehicles fail to comply with the requirements of 49 CFR Part 567, "Certification."
Risk. An overloaded vehicle can increase the risk of a crash.
Fix. Dealers will remove and replace the label, free of charge. Owner notification letters were mailed May 28, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0463.
2024 Mack MD recalls 5
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Equipment:other:labels
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 MD and Terrapro vehicles. The Gross Axle Weight Rating (GAWR) listed on the vehicle certification label is incorrect, which can allow the vehicle to be overloaded. As such, these vehicles fail to comply with the requirements of 49 CFR Part 567, "Certification."
Risk. An overloaded vehicle can increase the risk of a crash.
Fix. Dealers will remove and replace the label, free of charge. Owner notification letters were mailed May 28, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0463.
Parking Brake:indicator Light
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2024 MD6 and MD7 vehicles. The park brake light may indicate the incorrect brake status due to an incorrect park brake pressure switch.
Risk. The park brake light may indicate that the park brake is applied when it is not, possibly resulting in a vehicle roll away and increasing the risk of a crash.
Fix. Dealers will inspect and replace the brake pressure switch as necessary, free of charge. Owner notification letters were mailed March 11, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0460.
Steering:critical Fasteners
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2024 MD trucks. The steering wheel attachment bolt may loosen and separate from the steering shaft, causing the steering wheel to detach.
Risk. A detached steering wheel can cause a loss of steering control and increase the risk of a crash.
Fix. Owners are advised not to drive their vehicles until the repair has been performed. Dealers will replace the steering wheel retention bolt, free of charge. Owner notification letters were mailed November 20, 2023. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0453.
Steering
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2024 MD6 and MD7 vehicles. The steering gear fasteners may not be properly tightened.
Risk. Loose steering gear fasteners may result in a loss of vehicle control, increasing the risk of a crash.
Fix. Dealers will tighten the steering gear fasteners, free of charge. Owner notification letters are expected to be mailed October 23, 2023. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0449.
2023 Mack MD recalls 2
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Engine And Engine Cooling:engine:engine Control Module (ecu/ecm)
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2023 MD6/7 trucks. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down.
Risk. An unexpected engine shut down can increase the risk of a crash.
Fix. Cummins will replace the ECM, free of charge. Owner notification letters were mailed on September 27, 2022. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0438.
2022 Mack MD recalls 3
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Suspension:front:springs:leaf Spring Assembly:hanger,bracket
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2022 Medium-Duty Trucks. The spring hanger brackets on the front suspension may have loose bolts.
Risk. Loose suspension bolts can detach, possibly resulting in a loss of vehicle control and increasing the risk of a crash.
Fix. Dealers will tighten the spring hanger bracket bolts, free of charge. Owner notification letters were mailed on August 17, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0428.
Service Brakes, Hydraulic:pedals And Linkages
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2022 Mack MD vehicles. The cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.
Risk. An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.
Fix. Owners are advised to not drive their vehicles until the remedy has been performed. Dealers will inspect the cotter pin installation and repair it as necessary, free of charge. Owner notification letters were mailed on September 13, 2021. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0429.
2021 Mack MD recalls 2
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Service Brakes, Hydraulic:pedals And Linkages
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2022 Mack MD vehicles. The cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.
Risk. An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.
Fix. Owners are advised to not drive their vehicles until the remedy has been performed. Dealers will inspect the cotter pin installation and repair it as necessary, free of charge. Owner notification letters were mailed on September 13, 2021. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0429.
2020 Mack MD recalls 2
Seat Belts:front:anchorage
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
Risk. An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Fix. Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Service Brakes, Hydraulic:pedals And Linkages
What's wrong. Mack Trucks, Inc. (Mack) is recalling certain 2020-2022 Mack MD vehicles. The cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.
Risk. An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.
Fix. Owners are advised to not drive their vehicles until the remedy has been performed. Dealers will inspect the cotter pin installation and repair it as necessary, free of charge. Owner notification letters were mailed on September 13, 2021. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0429.
Best and worst years for the Mack MD
Based on NHTSA owner-complaint volume across 7 tracked years, the worst years are 2025, 2026, 2024 and the best (fewest complaints) are 2020, 2021, 2022.
ForCar aggregate — our own analysis of complaint volume, not published by NHTSA.
| Year | Owner complaints | Top issue | Verdict |
|---|---|---|---|
| 2020 MD | — | Best | |
| 2021 MD | — | Best | |
| 2022 MD | — | Best | |
| 2023 MD | — | Average | |
| 2024 MD | — | Avoid | |
| 2025 MD | Power Train | Avoid | |
| 2026 MD | — | Avoid |
What are the most common Mack MD problems?
The most-reported Mack MD problems are Power Train (1 reports), Service Brakes (1 reports) — out of 1 owner complaints NHTSA holds for the model. Here's how they break down:
Most-reported components — tap a category to read what owners actually experienced:
Power Train 1 Read
[XXX] - the truck lost brakes for the first time. The truck was returned 3/15/24 3/20/24 - The truck went back in the shop to get parts installed that were ordered. The truck was picked up 4/15/24. 4/16/24 - The truck went back in to the dealer for break noise and issues. The truck was picked up on 4/19/24. 4/22/24 - The truck went back to the dealer for break failure and issues. The truck was picked up 5/4/24 7/5/24 - The truck went back in the shop for break issues. The truck was picked up on 7/15/24 8/20/24 - the truck lost breaks - @ 11:14am, we called Dave/Mangino's @ 11:21am Let him know that we are done with the truck - it's not safe and that the dealer needs to figure out what to do next. 8/22/24 - Dropped truck off at Mangino's for the "Buy Back" per Dave Grossbeck. Also turned in the licenses plates. Waiting to hear from Dave for exact amount of check. 8/23/24 - Dave Grossbeck - told us he still does not have any answers from GM It's going to take some time. 8/26/24 - we went to Mangino's and met with Dave Grossbeck & Mike Coffey to call GM Customer Service together. Asked to speak with a supervisor. Was told they would have a call back within 24-48 hours. Have not heard back to date (8/30/24). Dave Grossbeck called GM Upper Management and was told they were having a meeting on Wednesday (8/28/24) regarding the truck. 8/26/24 - we contacted Gus (GM Engineer) regarding the truck - Guys replied that he was coming out on Wednesday (8/28/24) to evaluate the truck. 8/28/24 - Gus came to Mangino's - we heard nothing from anyone. 8/29/24 - we stopped in at Mangino's Dave Grossbeck had no new answers. 8/30/24 - Dave Grossbeck returned a call from us. Dave requested our GM claim #. 9/9/24 we received a payment for the truck in full minus interest and deal fees for the buy back. A week later the truck was on the dealers lot for sale. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Service Brakes 1 Read
[XXX] - the truck lost brakes for the first time. The truck was returned 3/15/24 3/20/24 - The truck went back in the shop to get parts installed that were ordered. The truck was picked up 4/15/24. 4/16/24 - The truck went back in to the dealer for break noise and issues. The truck was picked up on 4/19/24. 4/22/24 - The truck went back to the dealer for break failure and issues. The truck was picked up 5/4/24 7/5/24 - The truck went back in the shop for break issues. The truck was picked up on 7/15/24 8/20/24 - the truck lost breaks - @ 11:14am, we called Dave/Mangino's @ 11:21am Let him know that we are done with the truck - it's not safe and that the dealer needs to figure out what to do next. 8/22/24 - Dropped truck off at Mangino's for the "Buy Back" per Dave Grossbeck. Also turned in the licenses plates. Waiting to hear from Dave for exact amount of check. 8/23/24 - Dave Grossbeck - told us he still does not have any answers from GM It's going to take some time. 8/26/24 - we went to Mangino's and met with Dave Grossbeck & Mike Coffey to call GM Customer Service together. Asked to speak with a supervisor. Was told they would have a call back within 24-48 hours. Have not heard back to date (8/30/24). Dave Grossbeck called GM Upper Management and was told they were having a meeting on Wednesday (8/28/24) regarding the truck. 8/26/24 - we contacted Gus (GM Engineer) regarding the truck - Guys replied that he was coming out on Wednesday (8/28/24) to evaluate the truck. 8/28/24 - Gus came to Mangino's - we heard nothing from anyone. 8/29/24 - we stopped in at Mangino's Dave Grossbeck had no new answers. 8/30/24 - Dave Grossbeck returned a call from us. Dave requested our GM claim #. 9/9/24 we received a payment for the truck in full minus interest and deal fees for the buy back. A week later the truck was on the dealers lot for sale. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Source: NHTSA owner complaints, all model years. Bar = share of total complaints. Full reports searchable on NHTSA.gov.
Mack MD specifications & dimensions
The 2026 Mack MD. Full dimensions below — engine, horsepower and trim decode from your VIN. For the original factory build — MSRP, trim and standard equipment — rebuild the Mack MD window sticker.
| Specs cache warming… |
Source: NHTSA vPIC / Transport Canada vehicle specifications. Metric values converted to imperial; generation ranges approximate.
Mack MD cargo space, seating & interior room
How much the MD holds — passengers and cargo. Seating, cargo and interior dimensions vary by trim and seat configuration — decode your VIN for the exact build.
Exact seating capacity, third-row availability, legroom and headroom decode from your VIN or vary by trim — the original factory equipment & options list shows what each trim included.
Passenger & cargo volume from EPA fueleconomy.gov (largest configuration). Seats, legroom and headroom from NHTSA vPIC on VIN decode.
Mack MD tire size, oil type & owner specs
The fitment owners look up most — tires, wheels, oil and batteries. Exact wheel and tire sizes decode from your VIN or the driver's door-jamb placard; the universal items are listed below.
Exact tire, wheel, oil grade, capacity and battery group are added per trim and model year — decode your VIN above for the factory fitment. Universal items shown as-is.
What MPG does the Mack MD get?
MPG cache warming… reload in a moment.
What engines does the Mack MD have? Power & range
Powertrain data warming… reload in a moment.
How much does a Mack MD cost to own?
A Mack MD holds its value well. A typical example keeps roughly 56% of its value after five years — losing about 44% to depreciation. Check what a used MD is worth today or browse current used-market prices before you buy or sell. Fuel, maintenance and insurance add to the total cost to own.
| Age | Value retained | Est. resale value | Lost to depreciation |
|---|---|---|---|
| Year 1 | 84% | $25,200 | −$4,800 |
| Year 2 | 76% | $22,800 | −$7,200 |
| Year 3 | 68% | $20,400 | −$9,600 |
| Year 4 | 61% | $18,300 | −$11,700 |
| Year 5 | 56% | $16,800 | −$13,200 |
What goes into the five-year cost to own:
- Depreciation — the biggest cost: this MD loses about 44% of its value over five years. See the full depreciation curve by age.
- Fuel — based on EPA economy at roughly 15,000 miles a year.
- Maintenance & repairs — routine service, tires and wear items as the MD ages.
- Insurance — varies by driver, state and trim; get a quote for your exact figure.
Resale & depreciation are ForCar estimates from typical segment value-retention curves — not a live market quote. Fuel from EPA fueleconomy.gov at ~15k mi/yr.
Is the Mack MD safe?
NHTSA crash-test ratings aren't published for the MD yet — see the top-rated safest cars instead.
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How many miles does a Mack MD last?
A well-maintained Mack MD typically lasts 250,000–300,000+ miles. It's exceptionally durable — with routine maintenance many owners report 250k+ on the original powertrain. Its ForCar Reliability Score is 4.0/5.
Check your Mack MD’s VIN — history, recalls & specs
Title records, open recalls, build details and paint code — straight from the VIN. Free.
Check this MD’s VIN free →All Mack MD model years
A year-by-year snapshot of the Mack MD — recalls, best EPA fuel economy and NHTSA safety. Tap a year for full details.
| Year | Recalls | Best MPG | Safety |
|---|---|---|---|
| 2026 MD | 1 recall | — | — |
| 2025 MD | 2 recalls | — | — |
| 2024 MD | 5 recalls | — | — |
| 2023 MD | 2 recalls | — | — |
| 2022 MD | 3 recalls | — | — |
| 2021 MD | 2 recalls | — | — |
| 2020 MD | 2 recalls | — | — |
Recalls = NHTSA campaigns that year · MPG = best EPA combined · Safety = NHTSA overall stars (tested years).
Frequently asked questions
What are the worst years for the MD?
By owner-complaint volume, 2025, 2026, 2024 drew the most reports. 2020, 2021, 2022 have the cleanest records.
How many recalls does the MD have?
17 recorded NHTSA recalls across 2020–2026. Always check open recalls by your VIN.
How many miles does a MD last?
A well-maintained MD typically reaches 200,000–300,000 miles with regular maintenance.
Is the MD reliable?
Our ForCar Reliability Score for the MD is 4.0/5, based on NHTSA safety, recall history and complaint severity.
What's the Mack MD warranty?
New Mack models carry a 3 years / 36,000 miles basic (bumper-to-bumper) warranty and a 5 years / 60,000 miles powertrain warranty. Coverage can vary by model year and market — confirm with a Mack dealer.
Where is the Mack MD made?
The assembly plant is encoded in the VIN — the 11th character. Decode your MD's VIN above to see exactly where it was built; Mack may build it at more than one plant depending on the year.
How much ground clearance does the MD have?
Ground clearance varies by trim and drivetrain — AWD/4WD versions often sit higher. Decode your VIN or check the specific trim for the exact figure.