2026 Mack Md problems, complaints & recalls
Safety recalls (1)
Seat Belts 2025-05-21 · campaign 25V333000 · 42 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2026 Mack MD vehicles. The center bench seat belt assembly may be routed incorrectly.
Risk: An incorrectly routed seat belt assembly may not restrain an occupant as intended, increasing the risk of injury in a crash.
Fix: Dealers will inspect and replace the seat belt assembly as necessary, free of charge. Owner notification letters were mailed June 3, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0478.
Service bulletins (9)
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.
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.
Power Train 2026-03-12 · TSB M-432-002A 032026 · Service Bulletin/Repair Instructions
tsb - cable, gear selector, replacement
Visibility/Wiper 2025-10-22 · CBR 2517-1 102025 · Service Bulletin/Repair Instructions
cbr - wiper linkage inspection.
Electrical System 2025-08-22 · CBR 2172-5 082025 · Service Bulletin/Repair Instructions
cbr - when an ota (over-the-air) job starts to program the vecu blocks the starter relay out, if the job ends in a critical failure, the vehicle will remain in safe state.
Showing the 6 most recent of 9 bulletins. Search all of them free at nhtsa.gov.
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.