NHTSA Recall 26V139000: Software (engine and engine cooling)
Mack Trucks, Inc. reported this safety recall to NHTSA on , covering an estimated 775 vehicles. It affects 2022–2027 Mack Terrapro (te).
| NHTSA campaign | 26V139000 |
|---|---|
| Manufacturer campaign | SC0492 |
| Component | ENGINE AND ENGINE COOLING › ENGINE › ENGINE CONTROL MODULE (ECU/ECM) › SOFTWARE |
| Report received | March 11, 2026 |
| Owner notification | April 14, 2026 |
| Initiated by | Manufacturer |
Defect
Mack Trucks, Inc. (Mack) is recalling certain 2022-2027 TerraPro trucks. The engine control unit (ECU) software may allow the engine to start when the transmission is not in Neutral. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect."
Safety risk
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
Remedy
Dealers will update the ECU software, free of charge. Owner notification letters were mailed April 14, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0492. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov March 18, 2026.
Vehicles covered by recall 26V139000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.