Recall 15V276 covers 243 2011, 2012, 2014, 2015 Mci D4500 and D4000 motorcoaches for oil-leak fire risk. Repair is free at any franchised Mci dealer.
Mci is recalling 243 2011, 2012, 2014, 2015 D4500 and D4000 motorcoaches because excessive crankcase pressure can detach a 90-degree vent tube elbow and let engine oil reach hot surfaces. If oil reaches a hot surface, the fire risk increases; the Mci dealer repair will be free once available.
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What's wrong?
The crankcase ventilation breather is part of the engine breathing system on affected 2011, 2012, 2014, 2015 Mci D4500 and D4000 motorcoaches. The crankcase holds oil and moving lower-engine parts, and the vent tube assembly routes pressure and gases out of that area. The 90-degree elbow is the bent connector in that vent path.
On these motorcoaches, excessive engine crankcase pressure can push that elbow loose from the crankcase ventilation breather. Once the elbow detaches, the vent tube no longer routes oil vapor and pressure where designed. Engine oil can then reach hot engine surfaces, which is exactly the condition the recall is meant to prevent.
There is no warning sign before failure. The elbow can detach without a dashboard message or a clear change in how the coach drives, so the defect is not something an owner or driver can reliably catch from the seat.
Who's affected?
Covers D4500 and D4000 coach models across the 2011, 2012, 2014, and 2015 model years, all tied to the engine component.
| 2015 Mci D4500 | Engine |
|---|---|
| 2014 Mci D4500 | Engine |
| 2011 Mci D4000 | Engine |
| 2012 Mci D4000 | Engine |
| Units affected | 243 |
The model year and model name narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
Engine oil that reaches a hot surface raises the risk of a vehicle fire. Treat this as a service priority, limit unnecessary operation until the coach is inspected, and schedule the recall repair as soon as the service path is open. Repair will be free at any franchised Mci dealer once available.
What should I do?
- Check your VIN to confirm your 2011, 2012, 2014, 2015 Mci D4500 or D4000 motorcoach is included in this recall.
- Watch for the Mci owner letter mailed on June 18, 2015, and keep it with your motorcoach records.
- Contact Mci customer service at 1-800-241-2947 to confirm the Cummins service center path for the free repair.
- Ask the service center to secure the 90-degree elbow and reprogram the ECM so engine output is limited under misfire conditions that raise crankcase pressure.
- Reference recall number 15V276 and Mci recall SB 423 when you call.
- Avoid operating the motorcoach until Mci or the service center gives repair guidance, because engine oil on hot surfaces increases fire risk.
What happens at the repair
Mci will notify owners, and the repair is handled through a Cummins service center. The technician secures the ends of the 90-degree elbow on the vent tube assembly, then reprograms the electronic control module with software that adjusts engine output under misfire conditions to limit crankcase pressure. The recall remedy is free when performed under the campaign. Mci's remedy notice says the recall began on June 18, 2015, and lists SB 423 as Mci's recall number.
Timeline
| May 12, 2015 | NHTSA published the recall |
|---|---|
| June 18, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V276?
Recall 15V276 covers 243 2011, 2012, 2014, 2015 Mci D4000 and D4500 motorcoaches with crankcase ventilation breather vent-tube elbows that can detach. Engine oil can contact hot surfaces and increase the risk of a vehicle fire.
What should I do if my 2011, 2012, 2014, 2015 Mci D4000 or D4500 is on this recall?
Check your VIN to confirm your specific motorcoach is included in recall 15V276. If it is, contact Mci customer service at 1-800-241-2947 and ask where to have the Cummins service center repair completed. Reference recall number 15V276 when you call.
Is the recall repair free?
Yes. Mci says the repair is free, and federal recall law requires the manufacturer to correct the defect at no cost. The repair includes securing the 90-degree elbow ends and reprogramming the electronic control module software.
What is the safety risk?
The safety risk is a vehicle fire. Excessive engine crankcase pressure can detach the 90-degree elbow from the crankcase ventilation breather, allowing engine oil to contact hot surfaces. If your VIN is included, arrange the free Cummins service center repair.
When did the recall repair start?
The recall repair began on June 18, 2015. Mci directed owners to Cummins service centers for the free repair, which includes securing the vent-tube elbow ends and updating electronic control module software to limit crankcase pressure under misfire conditions.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V276000 |
|---|---|
| Mci customer service | 1-800-241-2947 |
| NHTSA recall # | 15V276 |
| NHTSA recall # (full) | 15V276000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 1, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →