The worst 2026 Mack Terrapro (Te) problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
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Recalls 1
Engine and engine cooling: engine: engine control module (ecu/ECM): software
- 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."
- Risk
- Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
- Remedy
- 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 March 18, 2026.
Recall number 26V139000 · Recall details
Technical service bulletins for the 2026 Mack Terrapro (Te) 9
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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Questions about the 2026 Mack Terrapro (Te)
Is the 2026 Mack Terrapro (Te) reliable?
Owners have filed 0 complaints about the 2026 Mack Terrapro (Te).
What is the most common problem with the 2026 Mack Terrapro (Te)?
There are not enough complaints to tell.
How many recalls does the 2026 Mack Terrapro (Te) have?
1 recall, covering engine and engine cooling.
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