The worst 2020 Mci J4500E problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 1
Electrical system: propulsion system: traction battery
- What is wrong
- 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.
- Remedy
- 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.
Recall number 25V567000 · Recall details
Technical service bulletins for the 2020 Mci J4500E 4
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This bulletin is to provide instructions for clearing DTC 1067 FMI 7 (Pressure Sensor Not Calibrated) and...
- This TSIB provides information to provide a software update
- This TSIB is to inform customers the recommended steering axle cleaning/greasing instructions to prevent...
- A consumer notification indicating one of New Flyer's battery suppliers is exiting the market.
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Questions about the 2020 Mci J4500E
Is the 2020 Mci J4500E reliable?
Owners have filed 0 complaints about the 2020 Mci J4500E.
What is the most common problem with the 2020 Mci J4500E?
There are not enough complaints to tell.
How many recalls does the 2020 Mci J4500E have?
1 recall, covering electrical system.
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