Recall 11V443 covers 33 2010-2011 E-One Quest, Typhoon, Cyclone Ii, and Tradition chassis for DOC/DPF clamp failure. Free repair through authorized Cummins dealers.
E-One is recalling 33 2010-2011 Quest, Typhoon, Cyclone Ii, and Tradition fire fighting chassis with Cummins diesel engines because a V-band clamp T-bolt on the DOC/DPF housing can fracture and let exhaust sections loosen or disconnect. Exhaust heat and gases create risks of fire, asphyxiation, carbon monoxide poisoning, and road debris; the dealer repair will be free once available.
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What's wrong?
The V-band clamp assembly on these 2010-2011 E-One Quest, Typhoon, Cyclone Ii, and Tradition fire fighting chassis holds sections of the diesel exhaust aftertreatment system together. The diesel oxidation catalyst and diesel particulate filter clean exhaust before it exits the vehicle. The clamp keeps the inlet and outlet cone sections sealed to that housing while the engine runs under heat, vibration, and load.
On affected chassis, the T-bolt inside the clamp is the weak point. That bolt tightens the band around the exhaust joint. When the bolt is stressed or loaded, it can fracture and fail. Once it breaks, the clamp loosens, and the inlet or outlet section attached to the DOC/DPF housing can disconnect.
There is no warning sign before failure. A driver or technician is more likely to discover the issue only after the clamp has loosened or an exhaust section has separated from the aftertreatment housing.
Who's affected?
The scope spans the Quest, Typhoon, Cyclone Ii, and Tradition across the 2010 and 2011 model years, with the same engine and cooling category listed for each.
| 2011 E-One Quest | Engine and engine cooling |
|---|---|
| 2011 E-One Typhoon | Engine and engine cooling |
| 2010 E-One Cyclone Ii | Engine and engine cooling |
| 2011 E-One Tradition | Engine and engine cooling |
| 2011 E-One Cyclone Ii | Engine and engine cooling |
| 2010 E-One Typhoon | Engine and engine cooling |
| Units affected | 33 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific truck.
What's the safety risk?
Exhaust clamp failure can let exhaust heat build up, creating a fire risk. Exhaust leakage also exposes occupants to asphyxiation or carbon monoxide poisoning, and a detached DOC/DPF housing can become a road hazard. Schedule the recall repair soon and drive cautiously until inspected. Repair will be free at any franchised E-One dealer once available.
What should I do?
- Check your VIN to confirm your 2010-2011 E-One Quest, Typhoon, Cyclone Ii, or Tradition is included in this recall.
- Watch for E-One or Cummins owner instructions tied to recall number 11V443 before scheduling service.
- Contact E-One or Cummins customer service to confirm the current repair path for the V-band clamp T-bolt failure on the diesel exhaust after your VIN shows this recall.
- Use an authorized Cummins dealer for the free V-band clamp repair that secures the DOC and DPF exhaust sections.
- Bring the recall notice if you have one, and reference recall number 11V443 when you call.
What happens at the repair
The record says E-One worked with Cummins to identify and notify owners, with repairs handled by authorized Cummins dealers. The repair path centers on the V-band clamp assembly that connects the inlet and outlet cone sections to the diesel oxidation catalyst and diesel particulate filter housing. Once the dealer repair is available for your vehicle, the technician will address the affected clamp assembly and T-bolt connection at no charge. Parts and labor are covered under the recall.
Timeline
| August 17, 2011 | NHTSA published the recall |
|---|---|
| October 10, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V443?
Recall 11V443 covers 33 2010-2011 E-One Quest, Typhoon, Cyclone Ii, and Tradition fire fighting chassis with Cummins diesel engines. The V-band clamp T-bolt on the DOC or DPF assembly can fracture, loosen the exhaust connection, and create carbon monoxide, fire, or road-hazard risk.
What should I do if my 2010-2011 E-One Quest, Typhoon, Cyclone Ii, or Tradition is on this recall?
Check your VIN to confirm your specific fire fighting chassis is included in recall 11V443. If it is, contact E-One service or an authorized Cummins dealer to arrange the V-band clamp repair. Reference recall 11V443 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to correct the safety defect at no cost, and the recall remedy says authorized Cummins dealers will perform the repair free of charge. Parts and labor are covered for included vehicles.
What is the safety risk in recall 11V443?
The safety risk is exhaust leakage, heat buildup, and part separation. A failed clamp can let exhaust sections disconnect from the DOC or DPF housing, creating carbon monoxide exposure, fire risk, or a road hazard if the housing detaches.
What if I bought this E-One fire fighting chassis used?
The free recall repair still applies. Federal recall law follows the vehicle, not the first owner. Check your VIN to confirm whether the chassis is included, then give recall 11V443 to E-One service or the authorized Cummins dealer when scheduling repair.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V443000 |
|---|---|
| E-One customer service | 1-812-377-5000 |
| NHTSA recall # | 11V443 |
| NHTSA recall # (full) | 11V443000 |
Source documents
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 →