Recall 21V748 covers 2,455 2017-2021 Mci motorcoaches for MDP circuit board failure. Repair is free at any franchised Mci dealer.
Mci is recalling 2,455 2017-2021 motorcoaches, including J4500 and D45 Crt Le models, under recall 21V748 because the Main Distribution Panel circuit board can fail inside the battery compartment. A failed board can start a fire or cause an unexpected shutdown, increasing crash risk, and Mci dealers will complete the free repair.
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What's wrong?
The Main Distribution Panel, or MDP, is the electrical distribution panel in the battery compartment on affected 2017-2021 Mci motorcoaches. It uses a circuit board to route battery power to coach systems and protect the wiring path. That board has to carry current cleanly while standing up to heat, vibration, moisture, and normal maintenance around the battery area.
On these coaches, the circuit board failures trace to a mix of design, manufacturing, and component quality problems. Standard maintenance practices can make the weakness worse. When the board fails, heat can build inside the battery compartment, and Mci reported minor thermal events tied to original MDP circuit board failures. The replacement design removes the board and uses a main disconnect with heavy-duty circuit breakers instead.
Before failure, an inspection can show thermal stress, corrosion, or cracks in the board's protective coating. Those signs are visual, so operators should have the MDP circuit board inspected until the recall repair is complete.
Who's affected?
Spans 9 Mci motor coach models across the 2017-2021 model years. All have the same main distribution panel circuit board.
| 2021 Mci D45 Crt Le | electrical system |
|---|---|
| 2020 Mci D45 Crt Le | electrical system |
| 2019 Mci D45 Crt Le | electrical system |
| 2018 Mci D45 Crt Le | electrical system |
| 2018 Mci D4000ISTV | electrical system |
| 2017 Mci D4500 | electrical system |
| 2017 Mci D4505 | electrical system |
| 2017 Mci J4500 | electrical system |
| 2018 Mci D4005 | electrical system |
| 2018 Mci D4500 | electrical system |
| 2018 Mci D4505 | electrical system |
| 2018 Mci J4500 | electrical system |
| 2019 Mci D4505 | electrical system |
| 2019 Mci J4500 | electrical system |
| 2019 Mci J3500 | electrical system |
| 2020 Mci J4500 | electrical system |
| 2019 Mci D4500 | electrical system |
| 2020 Mci D4500 | electrical system |
| 2019 Mci D4005 | electrical system |
| 2020 Mci D4005 | electrical system |
| 2020 Mci D4505 | electrical system |
| 2018 Mci J3500 | electrical system |
| 2020 Mci J3500 | electrical system |
| 2018 Mci D4000 | electrical system |
| 2021 Mci J4500 | electrical system |
| 2021 Mci J3500 | electrical system |
| 2020 Mci D4520 | electrical system |
| 2019 Mci D4000ISTV | electrical system |
| 2020 Mci D4000ISTV | electrical system |
| Units affected | 2,455 |
| Field incidents | NHTSA has logged 4 field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
A failed MDP circuit board can start a fire or shut the vehicle down unexpectedly, increasing crash risk. Watch for thermal stress, corrosion, or cracks in the circuit board coating during inspection, and follow Mci's rotational inspection guidance until the repair is complete. Repair is free at any franchised Mci dealer.
What should I do?
- Check your VIN to confirm your 2017-2021 Mci D45 Crt Le, D4000ISTV, D4500, D4505, J4500, D4005, J3500, D4000, or D4520 motorcoach is included in this recall.
- Contact an Mci Service Center to schedule the free MDP removal and main-disconnect and circuit-breaker-panel installation that fixes the failure-prone battery-compartment circuit board.
- Bring the recall notice if Mci mailed one. If not, reference recall number 21V748 and Mci recall R21-010 when you call.
- Call Mci customer service at 1-800-241-2947 with questions about scheduling or repair status.
- Limit operation until the repair is complete, since MDP circuit board failure can cause a fire or an unexpected shutdown.
What happens at the repair
At an Mci Service Center, an Mci technician removes the Main Distribution Panel in the battery compartment and installs a new main disconnect and circuit breaker panel. The recall repair is available now, and parts and labor are covered under the recall. The work addresses the circuit board inside the panel, which is the part identified in campaign 21V748. Contact the service center with your VIN so the shop can confirm the coach is included before scheduling.
Timeline
| September 24, 2021 | NHTSA published the recall |
|---|---|
| October 18, 2021 | Dealer notification began |
| October 18, 2021 | Dealer notification ended |
| October 18, 2021 | Interim owner notification (was planned for this date) |
| November 24, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V748?
Recall 21V748 covers 2,455 2017-2021 Mci motorcoaches with a Main Distribution Panel circuit board that can fail inside the battery compartment. The failure can cause a fire or an unexpected vehicle shutdown, increasing crash risk. Mci Service Centers will replace the panel setup for free.
What should I do if my 2017-2021 Mci motorcoach is on this recall?
Check your VIN to confirm your specific motorcoach is included in recall 21V748. If it is, contact an authorized Mci Service Center and reference recall R21-010 or NHTSA campaign 21V748. Mci will remove the Main Distribution Panel and install a new main disconnect and circuit breaker panel for free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair covered safety defects at no cost, and Mci says Service Centers will perform this repair free of charge. The repair removes the Main Distribution Panel and installs a new main disconnect and circuit breaker panel.
What is the safety risk in recall 21V748?
The safety risk is fire or an unexpected vehicle shutdown. The recalled Main Distribution Panel circuit board sits in the battery compartment, and failure of that board can shut the vehicle down without warning, increasing crash risk. Confirm the VIN, then arrange the free repair with an authorized Mci Service Center.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V748000 |
|---|---|
| Mci customer service | 1-800-241-2947 |
| NHTSA recall # | 21V748 |
| NHTSA recall # (full) | 21V748000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Recall Investigation Document (PDF) (PDF)
- Download Quarterly Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →