2020 Mci J4500e problems, complaints & recalls
Safety recalls (1)
Electrical System:propulsion System:traction Battery 2025-08-29 · campaign 25V567000 · 59 vehicles
Defect: Motor Coach Industries (MCI) is recalling certain 2020-2021 J4500E, 2021 D45CRTELE, 2023 J4500E, 2023-2024 D45CRTELE, 2024 D45CRTE, and 2025 J4500E buses. An inadequate weld on the high voltage battery busbar and incorrect software may cause the battery module to overheat.
Risk: A battery module that overheats increases the risk of a fire.
Fix: MCI will inspect and replace the battery module as necessary. MCI will also update the BMS software. Owner notification letters were mailed October 6, 2025. Owners may contact MCI customer service at 1-800-241-2947.
Service bulletins (4)
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.
Service Brakes 2026-08-11 · TSIB 26-07 · Service Bulletin/Repair Instructions
this bulletin is to provide instructions for clearing dtc 1067 fmi 7 (pressure sensor not calibrated) and fmi 11 (primary and secondary circuit pressure sensor (ps1/ps2) plausibility error - bs pressure), when required to prevent the loss of adaptive cruise control functionality and the illuminatio
Electrical System 2026-05-06 · TSIB 26-01 · Service Bulletin/Repair Instructions
this tsib provides information to provide a software update. some coaches using mcc hvac eco-tempo ecu # 07-10-009 software t35-1581 / v1.04 may be experiencing random fault codes due to mcc software errors.
Suspension 2026-02-09 · TSIB 26-04 · Service Bulletin/Repair Instructions
this tsib is to inform customers the recommended steering axle cleaning/greasing instructions to prevent damage on axle components due to displacement of grease from the bearings, lubrication reduction and accelerate wear for coaches with independent front suspension.
Fuel/Propulsion System 2025-10-31 · 251030 Battery email · Other
a consumer notification indicating one of new flyer's battery suppliers is exiting the market.
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.