CarRecallWatch- Component
- ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
- Problem
- 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."
- 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.
What this recall means for you
Certain 2022-2027 Mack TerraPro trucks have engine control unit software that may allow the engine to start when the transmission is not in Neutral. This means the vehicle does not meet federal safety requirements for transmission shift lever sequence and starter interlock.
Starting the vehicle while it is in gear can cause unexpected movement, which raises the risk of a crash or injury. Owners should take this seriously and arrange a repair promptly.
The repair is a software update performed free of charge by an authorized Mack dealer. Owners were mailed notification letters on April 14, 2026, and can contact Mack customer service at 1-800-866-1177 (recall number SC0492). You can also check your vehicle identification number (VIN) for open recalls on NHTSA.gov.
Check whether this recall is open on your vehicle
Official recall notice
Affected vehicles
| Mack Terrapro (Te) | 202220232024202520262027 |
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