2024 Mack Md problems, complaints & recalls
Most-reported problem areas: Service Brakes (1)
Safety recalls (5)
Seat Belts:front:anchorage 2025-10-06 · campaign 25V666000 · 15,841 vehicles
Defect: 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 2024-05-14 · campaign 24V333000 · 26 vehicles
Defect: 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 2024-03-01 · campaign 24V167000 · 117 vehicles
Defect: 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 2023-11-07 · campaign 23V746000 · 74 vehicles ⚠ DO NOT DRIVE
Defect: 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 2023-08-30 · campaign 23V605000 · 395 vehicles
Defect: 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.
Service bulletins (29)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2026-04-09 · CBR 2573-1 202604 · Service Bulletin/Repair Instructions
cbr - mack chassis - through shaft bearing retainer breakage on mack carriers.
Power Train 2026-04-09 · CBR 2362-3 202604 · Service Bulletin/Repair Instructions
cbr - mack carrier nut adhesive change.
Unknown Or Other 2026-03-19 · CBR 2712-7 032026 · Service Bulletin/Repair Instructions
cbr - no start condition after over the air programing.
Power Train 2026-03-12 · TSB M-432-002A 032026 · Service Bulletin/Repair Instructions
tsb - cable, gear selector, replacement
Engine 2026-01-07 · CBR 2107-22 202601 · Service Bulletin/Repair Instructions
cbr - mack def level (uqls) sensor troubleshooting guide - us17+obd16 emissions to us22+obd2023 (does not apply to an(4) and pr(4)).
Electrical System 2025-08-22 · CBR 2172-5 082025 · Service Bulletin/Repair Instructions
cbr - when an ota (over-the-air) job starts to program the vecu blocks the starter relay out, if the job ends in a critical failure, the vehicle will remain in safe state.
Showing the 6 most recent of 29 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-09 · Service Brakes“on october 7, 2026, our commercial truck underwent a vehicle inspection that identified serious concerns involving the air brake system, including air leakage, air pressure loss, and an issue with the air system breather. these defects raise significant safety concerns because improper air pressure in a commercial truck's braking system could comp…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.