Recall 11V411 affects 563 2010-2011 Gillig Low Floor buses for DOC/DPF clamp T-bolt fractures. Repair will be free at any franchised Gillig dealer once available
Gillig is recalling 563 2010-2011 Low Floor buses under recall 11V411 because a T-bolt in the exhaust aftertreatment V-band clamp can fracture and let the clamp loosen. If the exhaust sections disconnect, hot exhaust gases can vent before the tailpipe, raising fire risk, and the dealer repair will be free once Gillig makes the remedy available.
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What's wrong?
The exhaust aftertreatment system on the 2010-2011 Gillig Low Floor bus uses a diesel oxidation catalyst and diesel particulate filter to clean hot exhaust before it leaves the tailpipe. The V-band clamp is a metal band that wraps around the cone sections at the inlet and outlet of that housing. A T-bolt tightens the clamp so those sections stay locked to the DOC and DPF housing while the engine runs.
On these Gillig buses, the T-bolt in the clamp assembly can fracture when stress or load is applied. Once the bolt breaks, the clamp no longer holds full tension. The inlet or outlet cone section can loosen and disconnect from the DOC and DPF housing, leaving part of the exhaust aftertreatment assembly unsecured.
There is no warning sign before failure. An operator should not count on a warning light, noise, or driveability change before the clamp lets go.
Who's affected?
Spans the 2010 and 2011 Low Floor buses, with engine and engine cooling named for both model years.
| 2010 Gillig Low Floor | Engine and engine cooling |
|---|---|
| 2011 Gillig Low Floor | Engine and engine cooling |
| Units affected | 563 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
Hot exhaust gases venting before the tailpipe create a combustion and fire risk. If both clamps fail, the DOC/DPF housing can detach completely and become a road hazard. If your VIN is included, schedule the recall work and avoid delaying service. Repair will be free at any franchised Gillig dealer once available.
What should I do?
- Check your VIN to confirm your 2010-2011 Gillig Low Floor bus is included in this recall.
- Call Cummins at 1-812-377-5000 with questions about the remedy status for your bus.
- Ask a Gillig service contact about the DOC/DPF V-band clamp repair that prevents hot exhaust leaks and DOC/DPF housing separation.
- Reference recall number 11V411 when you call or schedule service.
- Keep the bus out of service if you see exhaust components loose near the DOC/DPF housing or smell hot exhaust, and ask Gillig about safe transport to service.
What happens at the repair
Gillig is working with Cummins to identify owners of 2010-2011 Low Floor buses with Cummins engines. Cummins is handling owner notification and the remedy for this campaign. The filing does not list the exact dealer procedure, so ask the Gillig service desk which Cummins remedy applies to your bus before scheduling work. Once the remedy is open for your VIN, the dealer repair will be free under the recall. Keep any Cummins or Gillig notices with your service paperwork.
Timeline
| August 10, 2011 | NHTSA published the recall |
|---|---|
| September 13, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V411?
Recall 11V411 covers 563 2010-2011 Gillig Low Floor buses with Cummins engines. A V-band clamp T-bolt can fracture, loosen the exhaust connection at the diesel oxidation catalyst and diesel particulate filter, and let hot exhaust gases escape before the tailpipe.
What should I do if my 2010-2011 Gillig Low Floor is on this recall?
Check your VIN to confirm your specific bus is included in recall 11V411. If it is, contact a Gillig service location or Cummins at 1-812-377-5000 and reference recall 11V411. Cummins handled the owner notification and remedy for this campaign.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to correct the defect at no cost to the owner. For recall 11V411, Cummins handled the remedy process tied to the V-band clamp assembly, and the repair path does not require owner payment for covered recall work.
What is the safety risk?
The safety risk is fire or a road hazard. If the inlet or outlet exhaust sections disconnect, hot exhaust gases can vent before the tailpipe and create a combustion risk. If both clamps fail, the DOC or DPF housing can detach completely in some applications.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V411000 |
|---|---|
| Gillig customer service | 1-812-377-5000 |
| NHTSA recall # | 11V411 |
| NHTSA recall # (full) | 11V411000 |
Source documents
-
Download Recall 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 →