The defect
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."
The risk
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
The remedy
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.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack MD (electric) | 2024, 2025, 2026 |
Components: ELECTRICAL SYSTEM:SOFTWARE | VEHICLE SPEED CONTROL:THROTTLE:THROTTLE POSITION SENSOR (TPS)
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack MD (electric) | 2024 | 0 | 4 |
| Mack MD (electric) | 2025 | 0 | 1 |
| Mack MD (electric) | 2026 | 0 | 1 |
Other vehicle speed control recalls in 2025
6 of the 891 recall campaigns reported to NHTSA in 2025 concerned the vehicle speed control; Mack Trucks, Inc. filed 118 campaigns in all.
| 25V677000 9 Oct 2025 | Braun Industries, Inc. |
| 25V598000 11 Sept 2025 | KTM North America, Inc. |
| 25V248000 16 Apr 2025 | Pure Sports Distributing Inc. |
| 25V137000 3 Mar 2025 | Motiv Power Systems |
| 25V014000 16 Jan 2025 | PACCAR Incorporated |
NHTSA recalls (public domain) · all recalls of 2025