2022–2027 Mack Terrapro (te) Recall: Engine control unit (ECU) software may allow the engine to start when the…
NHTSA campaign 26V139000 · Engine and Engine Cooling · filed Mar 11, 2026 · verified Jul 30, 2026
The 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."
The risk
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
Affected vehicles
Related recalls
More Mack Terrapro (te) recalls
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- 2024 Mack Anthem (an) and 2 other models — Steering gear assemblies may have been assembled…
- 2023–2024 Mack Anthem (an) and 3 other models — Engine may not return to idle within 2 seconds if the…
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 26V139000 (manufacturer number SC0492). Data last verified Jul 30, 2026.