The worst 2025 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 2
Electrical system: propulsion system: traction battery
- What is wrong
- Motor Coach Industries (MCI) is recalling certain 2024 D45CRTE, D45CRTELE, and 2025 J4500E coaches. The high voltage battery may experience a short circuit within the battery module when charging to near or full capacity.
- Risk
- A short circuit in a high voltage battery increases the risk of a fire.
- Remedy
- Owners are advised to park outside and away from structures until the recall repair is complete. Owners are also advised to avoid charging vehicles above 75% capacity. MCI will either replace the batteries, repurchase the vehicles, offer a vehicle trade-in or a reimbursement, free of charge. Owner notification letters were mailed June 8, 2026. Owners may contact MCI customer service at 1‑800‑241‑2947.
Recall number 25V632000 · Recall details
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 2025 Mci J4500E 8
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...
- Instructions to replace the MDS (Main Disconnect Switch) decal from a 1-minute wait with a 5-minute wait...
- A consumer notification indicating one of New Flyer's battery suppliers is exiting the market.
- MCI noticed that some customers operating in severe duty environments were experiencing the exterior...
- This Bulletin is being issued due to New Flyer & MCI have received reports that customers are re-torquing...
- Instructions to replace the BTMS coolant filter and filter head due to possible damage from galling.
Compare the 2025 Mci J4500E
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Questions about the 2025 Mci J4500E
Is the 2025 Mci J4500E reliable?
Owners have filed 0 complaints about the 2025 Mci J4500E.
What is the most common problem with the 2025 Mci J4500E?
There are not enough complaints to tell.
How many recalls does the 2025 Mci J4500E have?
2 recalls, covering electrical system.
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