2022 Mack Terrapro (Te) | 2023 Mack Terrapro (Te) | 2024 Mack Terrapro (Te) | 2025 Mack Terrapro (Te) | 2026 Mack Terrapro (Te) | 2027 Mack Terrapro (Te) — Engine and engine cooling: engine: engine control module (ecu/ecm): software
Published March 12, 2026 · Recall initiated: March 11, 2026
Summary
NHTSA records recall 26V139000, published March 12, 2026 and initiated March 11, 2026. Recalling firm: Mack Trucks, Inc.; 2022 Mack Terrapro (Te) | 2023 Mack Terrapro (Te) | 2024 Mack Terrapro (Te) | 2025 Mack Terrapro (Te) | 2026 Mack Terrapro (Te) | 2027 Mack Terrapro (Te) — Engine and engine cooling: engine: engine control module (ecu/ecm): software.
What's the hazard
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 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.
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Recall details
- Brand
- MACK
- Model
- TERRAPRO (TE)
- Manufacturer
- Mack Trucks, Inc.
- Lot
- 2022 MACK TERRAPRO (TE) | 2023 MACK TERRAPRO (TE) | 2024 MACK TERRAPRO (TE) | 2025 MACK TERRAPRO (TE) | 2026 MACK TERRAPRO (TE) | 2027 MACK TERRAPRO (TE)
- Risk classification
- V
- Country
- US
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Questions about this recall
Was 2022 Mack Terrapro (Te) | 2023 Mack Terrapro (Te) | 2024 Mack Terrapro (Te) | 2025 Mack Terrapro (Te) | 2026 Mack Terrapro (Te) | 2027 Mack Terrapro (Te) — Engine and engine cooling: engine: engine control module (ecu/ecm): software recalled?
Yes. NHTSA published recall 26V139000 on March 12, 2026. Reported hazard: 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 should I do if I have this product?
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.
How do I know if my unit is part of the recall?
Compare your product details with the notice. Brand: MACK. Model: TERRAPRO (TE).