The worst 2024 Mci D4520 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
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Recalls 1
Electrical system: instrument cluster/panel
- What is wrong
- Motor Coach Industries (MCI) is recalling certain 2018-2026 buses. Please see the complete list of models above. The instrument panel indicator light may not illuminate when the hazard warning lights are on and the master run switch is in the 'Off' position. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
- Risk
- Without the illuminated reminder, the driver may fail to turn off the exterior lights when no longer needed. Hazard warning lights that remain activated unintentionally can confuse other drivers, increasing the risk of a crash.
- Remedy
- MCI will update the software, free of charge. Owner notification letters are expected to be mailed November 24, 2026. Owners may contact MCI customer service at 1‑800‑241‑2947.
Recall number 26V645000 · Recall details
Technical service bulletins for the 2024 Mci D4520 10
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 bulletin introduces an optional product improvement to the A/C compressor drive system for coaches...
- 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 verify security of interior REI brand monitors on affected coaches.
- MCI noticed that some customers operating in severe duty environments were experiencing the exterior...
- This TSIB is to remind MCI coach operators that when servicing the HVAC belts, idler pulleys or the lower...
- Information to owners showing the proper procedure for checking the oil level in a BITZER HVAC compressor.
- Install handle lever stopper brackets on the Rear Side Service & Wheelchair Lift doors.
- Service instruction for updating plug doors to improve reliability and reduce wind noise.
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Questions about the 2024 Mci D4520
Is the 2024 Mci D4520 reliable?
Owners have filed 0 complaints about the 2024 Mci D4520.
What is the most common problem with the 2024 Mci D4520?
There are not enough complaints to tell.
How many recalls does the 2024 Mci D4520 have?
1 recall, covering electrical system.
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