Recall 20V303 covers 34 2020-2021 Thor Motor Coach motorhomes for rear wiring damage affecting fuel pump and ABS circuits. Repair is free.
Thor Motor Coach is recalling 34 2020-2021 Axis, Vegas, Chateau, Four Winds, and Quantum motorhomes because a rear wire harness can rub against the frame and damage fuel pump and ABS circuits. The damage can cause an unexpected engine stall or reduce ABS and roll stability control, which increases crash risk; the dealer repair will be free once available.
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What's wrong?
The rear wire harness on affected 2020-2021 Thor Motor Coach Axis, Vegas, Chateau, Four Winds, and Quantum motorhomes carries electrical signals for the fuel pump, fuel system pressure sensor, frame ground, rear wheel sensors, anti-lock braking system, and traction control. The harness is a bundled set of wires routed near the frame at the back of the vehicle. Those circuits help keep fuel flowing and help the brake system detect wheel speed during braking.
On these motorhomes, the harness can sit too close to the frame. The protective covering in that area is not enough to stop chafing when the harness contacts metal. As the insulation wears through, one or more circuits can short or open, which can interrupt fuel pump operation or disable ABS and roll stability control.
Before failure, the warning depends on which wire is damaged. Owners can see a check engine light, an anti-lock brake warning light, or a traction control indicator light.
Who's affected?
Covers 5 Thor Motor Coach motorhome lines across 2 model years, with the same 3 affected systems listed for each included line.
| 2020 Thor Motor Coach Axis | Electronic stability control (esc) |
|---|---|
| 2020 Thor Motor Coach Axis | wiring |
| 2020 Thor Motor Coach Axis | hydraulic brake system |
| 2020 Thor Motor Coach Vegas | Electronic stability control (esc) |
| 2020 Thor Motor Coach Vegas | wiring |
| 2020 Thor Motor Coach Vegas | hydraulic brake system |
| 2020 Thor Motor Coach Chateau | Electronic stability control (esc) |
| 2020 Thor Motor Coach Chateau | wiring |
| 2020 Thor Motor Coach Chateau | hydraulic brake system |
| 2020 Thor Motor Coach Four Winds | Electronic stability control (esc) |
| 2020 Thor Motor Coach Four Winds | wiring |
| 2020 Thor Motor Coach Four Winds | hydraulic brake system |
| 2020 Thor Motor Coach Quantum | Electronic stability control (esc) |
| 2020 Thor Motor Coach Quantum | wiring |
| 2020 Thor Motor Coach Quantum | hydraulic brake system |
| 2021 Thor Motor Coach Four Winds | Electronic stability control (esc) |
| 2021 Thor Motor Coach Four Winds | wiring |
| 2021 Thor Motor Coach Four Winds | hydraulic brake system |
| 2021 Thor Motor Coach Quantum | Electronic stability control (esc) |
| 2021 Thor Motor Coach Quantum | wiring |
| 2021 Thor Motor Coach Quantum | hydraulic brake system |
| 2021 Thor Motor Coach Chateau | Electronic stability control (esc) |
| 2021 Thor Motor Coach Chateau | wiring |
| 2021 Thor Motor Coach Chateau | hydraulic brake system |
| Units affected | 34 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific motorhome is included.
What's the safety risk?
Harness damage can cut power to the fuel pump and cause an unexpected engine stall. Damage to the ABS wiring can reduce anti-lock braking and roll stability control. That raises crash risk. Watch for the check engine light, ABS warning light, or traction control indicator, and schedule service promptly. Repair will be free at any franchised Thor Motor Coach dealer once available.
What should I do?
- Check your VIN to confirm your 2020-2021 Thor Motor Coach Axis, Vegas, Chateau, Four Winds, or Quantum motorhome is included in this recall.
- Contact Thor Motor Coach customer service at 1-877-855-2867 for current repair instructions and reference recall number 20V303 when you call.
- Schedule the free rear wire-harness inspection and repair that protects the fuel pump and ABS circuits from frame contact.
- Bring the recall notice if Thor Motor Coach mailed one, along with your VIN and recall number 20V303.
- Drive cautiously until the repair is complete, and stop driving if the engine stalls, ABS warning light comes on, or braking behavior changes.
What happens at the repair
Once the dealer repair is available, a Thor Motor Coach technician will inspect the rear wire harness for damage where it passes near the vehicle frame. If the harness is intact, the technician will apply anti-abrasion tape and confirm clearance from nearby components. If the harness is damaged, the technician will splice in new wire, apply anti-abrasion tape, and confirm the harness no longer rubs. Parts and labor are covered by the recall. Out-of-pocket repairs already paid are handled through the original warranty program, not through a separate reimbursement program.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| May 27, 2020 | NHTSA published the recall |
|---|---|
| June 25, 2020 | Owner notification mailed |
| July 27, 2020 | Dealer notification began |
| July 27, 2020 | Dealer notification ended |
Frequently asked questions
What is recall 20V303?
Recall 20V303 covers 34 2020-2021 Thor Motor Coach Axis, Vegas, Chateau, Four Winds, and Quantum motorhomes built on a Ford E-series chassis. A rear wire harness can contact the frame and damage circuits for the fuel pump, ABS, and roll stability control.
What should I do if my 2020-2021 Thor Motor Coach Axis, Vegas, Chateau, Four Winds, or Quantum is on this recall?
Check your VIN to confirm your specific motorhome is included in recall 20V303. If it is, contact Thor Motor Coach customer service at 1-877-855-2867 and ask for recall RC000189. The repair path is a free Ford dealer inspection and wiring repair if damage is found.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to fix the defect at no cost. For recall 20V303, the dealer inspection, anti-abrasion tape, clearance check, and any needed wire splice are performed free of charge.
What is the safety risk?
The safety risk is engine stall, reduced ABS function, and loss of roll stability control function if the rear wire harness is damaged. Those failures increase crash risk. The free repair checks the harness, protects the area with anti-abrasion tape, and repairs damaged wiring.
What if I bought this Thor Motor Coach motorhome used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to see whether your exact motorhome is included, then reference recall 20V303 or Thor Motor Coach recall RC000189 when you contact the service desk.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V303000 |
|---|---|
| Thor Motor Coach customer service | 1-877-855-2867 |
| NHTSA recall # | 20V303 |
| NHTSA recall # (full) | 20V303000 |
Source documents
-
Download Misc. Document (PDF) - Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →