2027 Mack Terrapro (Te) problems, complaints & recalls
Safety recalls (1)
Engine And Engine Cooling:engine:engine Control Module (Ecu/Ecm):software 2026-03-11 · campaign 26V139000 · 775 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."
Risk: Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
Fix: 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.
Service bulletins (5)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-06-22 · CBR-2592-1 202606 · Service Bulletin/Repair Instructions
the purpose of this cbr is to provide steps on how to correct a customer complaint of dtc p107b86 accompanied with intermittent loss of throttle.
Structure:body 2026-05-26 · CBR 2373-4 202605 · Service Bulletin/Repair Instructions
mack terrapro door adjustment procedure
Power Train 2026-04-09 · CBR 2573-1 202604 · Service Bulletin/Repair Instructions
cbr - mack chassis - through shaft bearing retainer breakage on mack carriers.
Power Train 2026-04-09 · CBR 2362-3 202604 · Service Bulletin/Repair Instructions
cbr - mack carrier nut adhesive change.
Unknown Or Other 2026-03-19 · CBR 2712-7 032026 · Service Bulletin/Repair Instructions
cbr - no start condition after over the air programing.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.