2021 Mci J3500 problems, complaints & recalls
Safety recalls (4)
Visibility:glass, Side/Rear 2025-12-10 · campaign 25V853000 · 15,454 vehicles
Defect: Motor Coach Industries (MCI) is recalling certain 102DL3, 102D3, MC12PTV, E4500, D4000, 102D3ISTV, D4500, J4500, D4000ISTV, D4005, D4505, and J3500 transit buses. Please refer to MCI's recall report for specific model year information. The front door lower curb view glazing material is incorrect. As such, these vehicles fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) number 205, "Glazing Materials."
Risk: The incorrect window glazing material may reduce the driver's visibility, increasing the risk of a crash.
Fix: MCI will replace the glass, free of charge. Owner notification letters were mailed February 4, 2026. Owners may contact MCI customer service at 1-800-241-2947. MCI's number for this recall is 22-005.
Equipment:mechanical:carrier/Rack 2023-04-05 · campaign 23V240000 · 140 vehicles
Defect: Motor Coach Industries (MCI) is recalling certain 2019-2021 D45CRTLE, J3500, and J4500 coaches, equipped with a rear-mounted bike rack. The vehicle's rear lighting may be obstructed when bikes are installed on the bike rack. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Risk: Obstructed rear lighting may reduce the visibility of the vehicle to other drivers, increasing the risk of a crash.
Fix: MCI will provide instructions and a kit to add lighting to the rear-mounted bike rack, free of charge. Owner notification letters were mailed August 31, 2023. Owners may contact MCI customer service at 1-800-241-2947.
Electrical System 2021-09-24 · campaign 21V748000 · 2,455 vehicles
Defect: Motor Coach Industries (MCI) is recalling certain 2018 D4000, 2018-2020 D4005, D4000ISTV, 2017-2020 D4500, D4505, 2018-2021 J3500, 2017-2021 J4500, 2020 D4520, and 2018-2021 D45CRTLE motorcoaches. The Main Distribution Panel (MDP) located within the battery compartment contains a circuit board that may fail.
Risk: MDP circuit board failure can result in a fire or an unexpected vehicle shutdown, increasing the risk of a crash.
Fix: MCI Service Centers will remove the MDP and install a new main disconnect and circuit breaker panel, free of charge. Owner notification letters were mailed November 12, 2021. Owners may contact MCI's customer service at 1-800-241-2947. MCI's number for this recall is R21-010.
Fuel System, Diesel:fuel Injection System:fuel Rail 2021-05-18 · campaign 21V364000 · 1,845 vehicles
Defect: Motor Coach Industries (MCI) is recalling certain 2017-2018 D4000, 2017-2019 D4005, D4000ISTV, D4505, 2017-2020 D4500, J4500, 2018-2020 D45CRTLE, and 2018-2021 J3500 vehicles. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Dealers will inspect the rail threads, and replace the rail as necessary, free of charge. Owner notification letters were mailed on June 28, 2021. Owners may contact MCI customer service at 1-800-241-2947. MCI's number for this recall is R21-009.
Service bulletins (17)
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.
Fuel/Propulsion System 2026-03-20 · ITS61079 · Service Bulletin/Repair Instructions
instructions to remove def sensor bypass calibration from engine ecm and new sensor installation ar - 22inch def tank - ca emissions.
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.
Engine 2025-01-21 · ITS61191 · Service Bulletin/Repair Instructions
instructions for relocating the idler pulley and adding a longer belt to improve reliability.
Electrical System 2025-01-09 · ITS61237 · Service Bulletin/Repair Instructions
instructions outlining the steps to replace the existing harness with mini fuses to a more robust design and heavier duty fuses.
Showing the 6 most recent of 17 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.