Mack recall: Engine and engine cooling
What is wrong
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."
What could happen
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
The fix
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
- Mack Terrapro (Te) 2022–2027
Facts
- NHTSA recall number
- 26V139000
- Type
- Vehicle
- Filed by
- Mack Trucks, Inc.
- Reported to NHTSA
- Mar 11, 2026
- Owners notified
- Apr 14, 2026
- Vehicles or items affected
- 775
- Started by
- The manufacturer
- Built
- Jan 11, 2021 to Feb 24, 2026
- Part
- Engine and engine cooling › Engine › Engine control module (ECU/ECM) › Software
- Maker's own recall number
- SC0492
- Safety standard
- FMVSS 102
Other recalls for the same vehicles
- Mack recall: Steering Aug 6, 2026
- Mack recall: Service brakes, air Jan 23, 2025
- Mack recall: Service brakes, hydraulic Oct 23, 2024
- Mack recall: Equipment May 14, 2024
- Mack recall: Steering Dec 26, 2023
- Mack recall: Vehicle speed control Nov 22, 2023
To check one car, enter its 17-character VIN on the official NHTSA page: a recall may cover only some vehicles of a model year.
Recall data: National Highway Traffic Safety Administration (NHTSA). Nebula is not affiliated with or endorsed by NHTSA.