Recall 11V178 covers 1,175 2010-2012 Thor Motor Coach RVs for unsecured oxygen sensor wiring. Repair is free at any franchised Thor Motor Coach dealer.
Thor Motor Coach is recalling 1,175 2010-2012 Majestic, Four Winds, Chateau, and related motorhomes under recall 11V178 because O2 sensor wiring for the catalytic converter can come loose, contact the exhaust, melt, and short. The short can trigger a check engine light or shut the engine down while driving, which increases crash risk; the Thor Motor Coach dealer repair will be free once available.
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What's wrong?
The oxygen sensor wiring on these 2010-2012 Thor Motor Coach motorhomes connects the sensor at the catalytic converter to the engine computer. That sensor reads oxygen in the exhaust stream so the engine can manage fuel mixture and monitor emissions. The wiring has to stay clipped away from hot exhaust parts.
In recall 11V178, the problem is the way that wiring is secured. If the harness is loose, it can drop onto the exhaust. The exhaust gets hot enough to melt the insulation around the wires, which lets the circuit short out.
Once the short happens, the check engine light can come on. The same electrical short can also cause the engine to shut down while driving. There is no warning sign before failure, so an owner will not have a reliable early cue before the wiring contacts the exhaust and starts to melt.
Who's affected?
Covers Majestic, Four Winds, Chateau, Chateau Citation, Freedom Elite, and Four Winds Siesta motorhomes across the 2010, 2011, and 2012 model years, all listed under electrical equipment.
| 2011 Thor Motor Coach Majestic | Electrical |
|---|---|
| 2011 Thor Motor Coach Four Winds | Electrical |
| 2012 Thor Motor Coach Four Winds | Electrical |
| 2010 Thor Motor Coach Four Winds | Electrical |
| 2012 Thor Motor Coach Majestic | Electrical |
| 2011 Thor Motor Coach Chateau | Electrical |
| 2011 Thor Motor Coach Chateau Citation | Electrical |
| 2011 Thor Motor Coach Freedom Elite | Electrical |
| 2011 Thor Motor Coach Four Winds Siesta | Electrical |
| 2010 Thor Motor Coach Chateau | Electrical |
| 2012 Thor Motor Coach Chateau | Electrical |
| 2012 Thor Motor Coach Freedom Elite | Electrical |
| Units affected | 1,175 |
A matching year and model does not confirm inclusion. Check your VIN to confirm whether this recall applies to your specific motorhome.
What's the safety risk?
NHTSA campaign 11V178 states that an engine shutdown while driving increases crash risk. Drive cautiously, leave extra space, and schedule the recall work with the dealer. Repair will be free at any franchised Thor Motor Coach dealer once available.
What should I do?
- Check your VIN to confirm your 2010-2012 Thor Motor Coach Majestic, Four Winds, Chateau, Chateau Citation, Freedom Elite, or Four Winds Siesta is included in this recall.
- Contact Thor Motor Coach warranty service to confirm repair timing for your VIN.
- Ask about the free oxygen-sensor wiring clamp and fastener repair that keeps the wiring from falling onto the exhaust, melting, and shutting down the engine while driving.
- Bring the recall notice if Thor Motor Coach has mailed one. If not, reference recall number 11V178 when you call.
- Drive cautiously until the repair is complete. Pull over safely if the check engine light comes on or the engine loses power.
What happens at the repair
At the dealer, a Thor Motor Coach technician secures the oxygen sensor wiring by installing a clamp and adding an additional fastener, so the wiring stays off the exhaust. The work is meant to keep the wiring from melting, shorting, triggering a check engine light, or shutting the engine down while driving. The dealer repair will be free once available. The recall began on March 31, 2011. Contact the Thor Motor Coach warranty service department with repair questions before scheduling.
Timeline
| March 15, 2011 | NHTSA published the recall |
|---|---|
| March 31, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V178?
Recall 11V178 covers 1,175 2010-2012 Thor Motor Coach Majestic, Four Winds, Chateau, Chateau Citation, Freedom Elite, and Four Winds Siesta motorhomes with unsecured oxygen-sensor wiring near the catalytic converter. The wiring can fall onto the exhaust, melt, short out, turn on the check engine light, and shut down the engine while driving.
What should I do if my 2010-2012 Thor Motor Coach motorhome is on this recall?
Check your VIN to confirm your specific motorhome is included in recall 11V178. If it is, contact a franchised Thor Motor Coach dealer or Thor Motor Coach warranty service at 1-877-500-1020 to schedule the oxygen-sensor wiring repair. The dealer repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the safety defect at no cost. Thor Motor Coach dealers will secure the oxygen-sensor wiring by installing a clamp and adding an additional fastener free of charge.
What warning signs should I watch for?
A check engine light is the warning sign named in the recall filing. The defect involves oxygen-sensor wiring that can drop onto the exhaust, melt, and short out. In some vehicles, that short can shut the engine down while driving.
What if I bought my Thor Motor Coach motorhome used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your specific motorhome is included, then reference recall 11V178 when you call a Thor Motor Coach dealer or warranty service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V178000 |
|---|---|
| Thor Motor Coach customer service | 1-877-500-1020 |
| NHTSA recall # | 11V178 |
| NHTSA recall # (full) | 11V178000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - 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 3, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →