2026 Mack Md (Electric) problems, complaints & recalls
Safety recalls (1)
Electrical System:software 2025-06-23 · campaign 25V427000 · 148 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
Risk: An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Fix: Dealers will update the control unit software, free of charge. Owner notification letters were mailed August 14, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0481.
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.
Structure:body 2026-08-06 · TSB M261009 202608 · Service Bulletin/Repair Instructions
the current md electric cooling box mounting blocks access to the radiator drain. this procedure gives the instructions to gain access to the radiator drain.
Electrical System 2026-08-02 · S5025 202608 · Service Campaign
certain mmde model mack trucks were assembled without fuse and relay center labels.
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.
Electrical System 2025-10-16 · CBR 2405-3 102025 · Service Bulletin/Repair Instructions
cbr - mack chassis - mde instrument cluster(ic) nuisance popup message.
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.