Safety Recall NHTSA · 26V139000 Reported March 11, 2026

Ecu software error may cause unexpected vehicle movement/fmvss 102

Mack Trucks, Inc. · Engine And Engine Cooling · 775 vehicles potentially affected

NHTSA ID
26V139000
Manufacturer Campaign
SC0492
Manufacturer
Mack Trucks, Inc.
Component
Engine And Engine Cooling
Vehicles Affected
775
Recall Type
Vehicle
Report Received
March 11, 2026

Defect Summary

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 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.

What you should do

  1. Look up your VIN at nhtsa.gov/recalls to confirm this recall applies to your vehicle.
  2. Contact an authorized Mack Trucks, Inc. dealer and reference recall ID 26V139000 or campaign SC0492.
  3. Schedule the free repair. By federal law, the manufacturer must remedy the defect at no cost.
View Official NHTSA Notice →
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FAQ: Recall 26V139000

Your rights, the repair process, and what each field on this page means.

What is recall 26V139000?

NHTSA recall 26V139000 was issued by Mack Trucks, Inc. on March 11, 2026. It addresses: Ecu software error may cause unexpected vehicle movement/fmvss 102. The recall affects approximately 775 vehicles, with the defect involving the Engine And Engine Cooling component.

How do I get this recall repaired?

Contact any authorized Mack Trucks, Inc. dealer and reference NHTSA recall ID 26V139000 or the manufacturer campaign number SC0492. Under federal law, the repair is completely free regardless of vehicle age or owner history.

Is my vehicle included in this recall?

The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.

How long do I have to get a recall repair done?

There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.

Where does the data on this page come from?

All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-20. For the most current official notice, visit nhtsa.gov/recalls.