Recall 20V559 covers 1,631 2018-2021 Thor Motor Coach motorhomes for valve-stem-extension damage. Repair is free at any franchised Thor Motor Coach dealer.
Thor Motor Coach is recalling 1,631 2018-2021 Aria, Palazzo, Tuscany, and Venetian motorhomes because the inner wheel tire valve stem extension can contact the outer wheel rim opening and become damaged. Severe damage can lead to loss of tire pressure in the inner wheel, increasing crash risk, and Thor Motor Coach dealers will complete the repair free of charge.
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What's wrong?
The inner wheel valve stem extension on 2018-2021 Thor Motor Coach Aria, Palazzo, Tuscany, and Venetian motorhomes gives access to the tire valve on the inside rear wheel. It lets an owner or technician check tire pressure and add air without reaching between the dual wheels. The extension is supposed to stay clear of the outer wheel rim opening while the motorhome is driven.
On affected motorhomes, the inner wheel valve stem extension sits close enough to the outer wheel rim opening that it contacts the rim. That contact causes rubbing while the wheel turns. The rubbing damages the extension, the stabilizer, or the rim, and the inner tire can lose air pressure.
Operators can hear a rattling noise from the valve stem extension rubbing against the wheel opening while driving. A visual inspection during maintenance can also show a dislocated stabilizer, damage to the stem extension or rim, or low pressure in the inner tire.
Who's affected?
Covers the Aria, Palazzo, Tuscany, and Venetian model lines across 2018-2021, all tied to the same tire valve component.
| 2018 Thor Motor Coach Tuscany | tire |
|---|---|
| 2018 Thor Motor Coach Venetian | tire |
| 2019 Thor Motor Coach Tuscany | tire |
| 2019 Thor Motor Coach Venetian | tire |
| 2020 Thor Motor Coach Aria | tire |
| 2020 Thor Motor Coach Venetian | tire |
| 2019 Thor Motor Coach Aria | tire |
| 2020 Thor Motor Coach Tuscany | tire |
| 2018 Thor Motor Coach Aria | tire |
| 2018 Thor Motor Coach Palazzo | tire |
| 2019 Thor Motor Coach Palazzo | tire |
| 2021 Thor Motor Coach Aria | tire |
| 2021 Thor Motor Coach Palazzo | tire |
| 2021 Thor Motor Coach Venetian | tire |
| 2021 Thor Motor Coach Tuscany | tire |
| 2020 Thor Motor Coach Palazzo | tire |
| Units affected | 1,631 |
| 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?
Damage to the valve stem extension can cause the inner tire to lose pressure, increasing the risk of a crash. Listen for rattling from the extension near the wheel opening, and treat low inner tire pressure or visible stem damage as a reason to stop and arrange service. Repair is free at any franchised Thor Motor Coach dealer.
What should I do?
- Check your VIN to confirm your 2018-2021 Thor Motor Coach Tuscany, Venetian, Aria, or Palazzo motorhome is included in this recall.
- Contact Thor Motor Coach customer service or a DTNA dealer to schedule the free inspection and valve-stem repair.
- Ask the dealer to inspect the inner wheel valve stem stabilizers and adjust them or replace the inner valve stem so the extension cannot contact the outer wheel rim opening.
- Bring the recall notice if Thor Motor Coach mailed one. If not, reference recall number 20V559 when you call.
- Inspect tire pressure before each trip and stop driving if the inner rear tire loses pressure before the repair is complete.
What happens at the repair
At a DTNA authorized service facility, the technician inspects the inner wheel valve stem stabilizers. If the stabilizers are out of position, the technician adjusts them. If the inner valve stem is damaged or needs replacement, it is replaced. The inspection, adjustment, and any valve stem replacement are free under the recall. If you already paid for this repair before the owner letter, ask TMC or the service facility for the reimbursement instructions included in the owner notification letter.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 15, 2020 | NHTSA published the recall |
|---|---|
| November 2, 2020 | Owner notification mailed |
| November 15, 2020 | Dealer notification began |
| November 15, 2020 | Dealer notification ended |
| November 15, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V559?
Recall 20V559 covers 1,631 2018-2021 Thor Motor Coach Aria, Palazzo, Tuscany, and Venetian motorhomes built on a DTNA chassis. The inner wheel tire valve stem extension can contact the outer wheel rim opening, become damaged, and cause inner tire pressure loss, increasing crash risk.
What should I do if my 2018-2021 Thor Motor Coach Aria, Palazzo, Tuscany, or Venetian is on this recall?
Check your VIN to confirm your specific motorhome is included in recall 20V559. If it is, contact a franchised Thor Motor Coach or DTNA dealer to schedule the inspection. The dealer will inspect the inner wheel valve stem stabilizers, adjust them, and replace the inner valve stem if needed for free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to provide the recall remedy at no cost. For recall 20V559, DTNA dealers inspect the inner wheel valve stem stabilizers, adjust them if needed, and replace the inner valve stem if needed free of charge.
What is the safety risk?
The safety risk is loss of tire pressure in the inner wheel. If the valve stem extension is extensively damaged, the inner tire can lose pressure and raise the risk of a crash. The repair path is an inspection, adjustment, and valve stem replacement if needed.
What if I bought this motorhome used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your 2018-2021 Thor Motor Coach Aria, Palazzo, Tuscany, or Venetian is included, then reference recall 20V559 when you call the dealer service desk.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V559000 |
|---|---|
| Thor Motor Coach customer service | 1-800-524-5210 |
| NHTSA recall # | 20V559 |
| NHTSA recall # (full) | 20V559000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Investigation Document (PDF) (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 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →