Recall 17V337 affects 143 2011-2012 Mci D4000, D4005, D4500, and D4505 coaches for exhaust bellow pipe failure. Repair is free at any franchised Mci dealer.
Mci is recalling 143 2011-2012 D4000, D4005, D4500, and D4505 coaches with Cummins ISX 12 liter engines because an incorrectly installed exhaust bellow pipe can bend and fail early. If that pipe fails during a diesel regeneration cycle, hot exhaust gases raise the risk of fire; the dealer repair will be free once available.
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What's wrong?
The exhaust bellow pipe on these 2011-2012 Mci D4000, D4500, D4505, and D4005 coaches is part of the engine exhaust system. On coaches with Cummins ISX 12 liter engines, this pipe carries exhaust away from the engine while allowing controlled movement as the engine and exhaust hardware heat, cool, and vibrate.
On affected coaches, the exhaust bellow pipe was installed incorrectly. That installation leaves a bend in the pipe, which puts stress on a part that is supposed to sit and flex within its designed shape. Over normal use, that extra stress leads to premature failure of the pipe. A failed pipe no longer carries exhaust through that section as designed.
There is no warning sign before failure. The recall information does not identify a driver-visible symptom before the exhaust bellow pipe fails.
Who's affected?
The D4000, D4500, D4505, and D4005 share the same exhaust-system component, with coverage across the 2011 and 2012 model years.
| 2011 Mci D4000 | Exhaust system |
|---|---|
| 2012 Mci D4000 | Exhaust system |
| 2011 Mci D4500 | Exhaust system |
| 2011 Mci D4505 | Exhaust system |
| 2012 Mci D4505 | Exhaust system |
| 2012 Mci D4500 | Exhaust system |
| 2011 Mci D4005 | Exhaust system |
| 2012 Mci D4005 | Exhaust system |
| Units affected | 143 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific bus.
What's the safety risk?
A failed bellow pipe during a diesel regeneration cycle lets hot exhaust gases raise the risk of fire. If your VIN is included, schedule the dealer inspection soon and follow dealer guidance before returning the coach to regular service. Repair will be free at any franchised Mci dealer once available.
What should I do?
- Check your VIN to confirm your 2011-2012 Mci D4000, D4500, D4505, or D4005 coach is included in this recall.
- Contact a franchised Mci dealer and ask whether service is open for recall number 17V337.
- Schedule the exhaust bellow pipe inspection and replacement that fixes the bent pipe risk in the exhaust system.
- Bring the recall notice if Mci mailed one, and reference recall number 17V337 when you call.
- Keep the coach away from service until the dealer inspects the exhaust bellow pipe, because failed pipe can raise the risk of fire during diesel regeneration.
What happens at the repair
The repair plan is for a Mci technician to inspect the exhaust bellow pipe for deformation or failure caused by the incorrect bend. Any bellow pipe that is deformed or failed is replaced at no charge. Schedule only after the dealer confirms the repair is open for your VIN. Parts and labor are covered once the recall repair is available.
Timeline
| May 24, 2017 | NHTSA published the recall |
|---|---|
| June 15, 2017 | Owner notification mailed |
Frequently asked questions
What is recall 17V337?
Recall 17V337 covers 143 2011-2012 Mci D4000, D4500, D4505, and D4005 coaches with Cummins ISX 12 liter engines. An incorrectly installed exhaust bellow pipe can bend and fail early. Mci dealers inspect and replace deformed or failed bellow pipes for free.
What should I do if my 2011-2012 Mci D4000, D4500, D4505, or D4005 is on this recall?
Check your VIN to confirm your specific coach is included in recall 17V337. If it is, contact a franchised Mci dealer and ask for the SB 397B exhaust bellow pipe inspection. The dealer repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mci's remedy says dealers inspect and replace deformed or failed exhaust bellow pipes free of charge. Use recall 17V337 or Mci recall number SB 397B when scheduling service.
What is the safety risk?
The safety risk is fire. If the exhaust bellow pipe fails and a diesel regeneration cycle occurs, hot exhaust gases increase the risk of a fire. Confirm the VIN, then arrange the free dealer inspection and replacement if your coach is included.
What if I bought this Mci coach used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. If you never received the June 15, 2017 recall notice, check your VIN and give the dealer recall 17V337 or SB 397B when you call.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/17V337000 |
|---|---|
| Mci customer service | 1-800-241-2947 |
| NHTSA recall # | 17V337 |
| NHTSA recall # (full) | 17V337000 |
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 May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →