NHTSA Campaign 25V427000

ELECTRICAL SYSTEM:SOFTWARE

Issued by Mack Trucks, Inc. · Reported Jun 23, 2025 · 148 vehicles affected

What's 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."

Consequence

An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.

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.

Vehicles affected by this recall

Make Model Year Units
MACK MD (ELECTRIC) 2024 148
MACK MD (ELECTRIC) 2025 148
MACK MD (ELECTRIC) 2026 148

Source: NHTSA Campaign 25V427000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.