Electrical system: softwareRecall 25V-427 · 2024–2026 Mack MD (electric)
Mack Trucks, Inc. recall 25V-427 covers 148 2024–2026 Mack MD (electric) for a electrical system: software problem, reported to NHTSA on June 23, 2025. The manufacturer's latest report (2026 Q3) shows 47% of affected vehicles repaired.
Source: NHTSA recall 25V427000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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 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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
47%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA.
Vehicles in this recall
Built from June 22, 2023 to February 17, 2025. Not every vehicle in these model years is included; check by VIN.