Mack Terrapro (Te) recall 26V139000 - Software

NHTSA · March 11, 2026

• NHTSA recall campaign 26V139000 (Mack), reported March 11, 2026.
• Potentially affected vehicles: 775.
• Component: Software.
• Details as of October 23, 2026; the linked official notice is authoritative for lot codes, VINs, and remedies.

Agency

NHTSA

Posted

March 11, 2026

Recalling firm

Mack Trucks, Inc.

Source ID

26V139000

NHTSA campaign →

How this recall compares

• NHTSA's recalls file lists 137 recall campaigns from Mack Trucks, Inc since 2010, 8 of them reported in 2026 so far.
• At 775 vehicles, it is larger than 54% of the 738 NHTSA campaigns from 2026 so far with a count of potentially affected vehicles.

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."

Consequence

Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.

Corrective action

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

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