Recall 11V431 affects 78 2010 New Flyer transit buses for a DOC/DPF clamp failure. Repair is free through authorized Cummins dealers.
New Flyer is recalling 78 2010 heavy duty transit buses, including the DE40LFR, D40LFR, and D35LFR, because a V-band clamp T-bolt on the diesel exhaust aftertreatment system can fracture. If the clamp loosens, hot exhaust gases can vent before the tailpipe or the DOC/DPF housing can detach, creating fire risk and a road hazard; the New Flyer dealer repair will be free once available.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The V-band clamp assembly on the 2010 New Flyer D35LFR, D40LFR, D60LFR, DE40LFR, DE60LFR, XD35, XDE35, and XDE40 buses holds sections of the diesel exhaust aftertreatment system together. That system includes the diesel oxidation catalyst and diesel particulate filter, which treat exhaust before it leaves the bus. The clamp wraps around the inlet and outlet cone sections so those parts stay tight against the DOC/DPF housing.
On affected buses with Cummins diesel engines, the T-bolt in the clamp assembly can fracture when the clamp is under stress or load. Once that bolt breaks, the clamp loses its grip. The inlet or outlet section attached to the DOC/DPF housing can then loosen and disconnect from the exhaust aftertreatment housing.
There is no warning sign before failure. A driver or maintenance technician first notices a loose exhaust section, abnormal exhaust noise, or visible separation only after the clamp has already failed.
Who's affected?
Covers 8 bus models. All involve the engine and engine cooling system.
| 2010 New Flyer DE40LFR | Engine and engine cooling |
|---|---|
| 2010 New Flyer D40LFR | Engine and engine cooling |
| 2010 New Flyer D35LFR | Engine and engine cooling |
| 2010 New Flyer DE60LFR | Engine and engine cooling |
| 2010 New Flyer D60LFR | Engine and engine cooling |
| 2010 New Flyer XD35 | Engine and engine cooling |
| 2010 New Flyer XDE35 | Engine and engine cooling |
| 2010 New Flyer XDE40 | Engine and engine cooling |
| Units affected | 78 |
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?
Failed exhaust aftertreatment clamps can let hot exhaust gases vent before the tailpipe, creating fire risk. If both clamps fail, the DOC/DPF housing can detach and become a road hazard. Schedule the recall repair and keep the bus in service only if it operates normally. Repair will be free at any franchised New Flyer dealer once available.
What should I do?
- Check your VIN to confirm your 2010 New Flyer DE40LFR, D40LFR, D35LFR, DE60LFR, D60LFR, XD35, XDE35, or XDE40 is included in this recall.
- Use the New Flyer owner notice if you received one, or reference recall number 11V431 when you call.
- Contact Cummins at 1-812-377-5000 to confirm the free repair path for the exhaust clamp defect.
- Schedule the V-band clamp repair that prevents hot exhaust gases from venting before the tailpipe.
- Keep the bus out of service if the exhaust housing is loose, disconnected, or showing fire damage until it is inspected.
What happens at the repair
At an authorized Cummins dealer, the repair addresses the V-band clamp assembly that connects the inlet and outlet cone sections to the diesel oxidation catalyst and diesel particulate filter. The technician checks the clamp assembly and completes the Cummins recall repair at no charge. Because the source does not list a current remedy status, confirm repair availability before sending the bus in. Once the repair is open for your VIN, parts and labor are covered under the recall.
Timeline
| August 22, 2011 | NHTSA published the recall |
|---|---|
| September 1, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V431?
Recall 11V431 covers 78 2010 New Flyer transit buses with Cummins diesel engines. The V-band clamp T-bolt on the DOC/DPF exhaust housing can fracture, loosen the clamp, and let exhaust sections disconnect. Authorized Cummins dealers perform the repair for free.
What should I do if my 2010 New Flyer DE40LFR, D40LFR, D35LFR, DE60LFR, D60LFR, XD35, XDE35, or XDE40 is on this recall?
Check your VIN to confirm your specific bus is included in recall 11V431. If it is, contact an authorized Cummins dealer or New Flyer customer service and reference recall 11V431. The repair is free through the authorized Cummins dealer network.
Is the recall repair free?
Yes. Federal recall law requires the defect repair at no cost, and New Flyer's recall remedy says authorized Cummins dealers perform the repair free of charge. Keep the recall number, VIN, and engine information ready when arranging service.
What is the safety risk in recall 11V431?
The safety risk is fire and road debris from the exhaust aftertreatment housing. If the inlet or outlet sections disconnect, hot exhaust gases can vent before leaving the tailpipe, creating a combustion and fire risk. If both clamps fail, the DOC/DPF housing can detach and become a road hazard.
When did New Flyer begin recall 11V431 repairs?
New Flyer began the safety recall on September 1, 2011. The remedy record says New Flyer worked with Cummins to identify and notify owners, with authorized Cummins dealers performing the free repair. Operators can use recall 11V431 when coordinating service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V431000 |
|---|---|
| New Flyer customer service | 1-812-377-5000 |
| NHTSA recall # | 11V431 |
| NHTSA recall # (full) | 11V431000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →