NHTSA campaign 25V427000
Mack Trucks, Inc. recall 25V427000
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 can happen
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Repair
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.
Components
- Electrical system: Software
- Vehicle speed control: Throttle: Throttle position sensor (tps)
Affected years and models
A listed year and model does not mean every vehicle in that group is recalled. Use the VIN lookup to confirm a specific vehicle.