Mack recall: Vehicle speed control
What is wrong
Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
What could happen
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
The fix
Dealers will update the control unit software, free of charge. Owner notification letters were mailed August 14, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0481.
Vehicles covered
- Mack Md (Electric) 2024–2026
Facts
- NHTSA recall number
- 25V427000
- Type
- Vehicle
- Filed by
- Mack Trucks, Inc.
- Reported to NHTSA
- Jun 23, 2025
- Owners notified
- Aug 14, 2025
- Vehicles or items affected
- 148
- Started by
- The manufacturer
- Built
- Jan 22, 2025 to Feb 17, 2025
- Part
- Vehicle speed control › Throttle › Throttle position sensor (tps); Electrical system › Software
- Maker's own recall number
- SC0481
- Safety standard
- FMVSS 124
Other recalls for the same vehicles
- Mack recall: Seat belts Oct 6, 2025
- Mack recall: Electrical system Jun 16, 2024
- Mack recall: Electrical system Jun 4, 2024
To check one car, enter its 17-character VIN on the official NHTSA page: a recall may cover only some vehicles of a model year.
Recall data: National Highway Traffic Safety Administration (NHTSA). Nebula is not affiliated with or endorsed by NHTSA.