Recall 18V507 affects 175 2017-2019 Thor Motor Coach Venetian and Aria motorhomes for loose brake caliper bolts. Free repair once Thor Motor Coach opens it.
Thor Motor Coach is recalling 175 2017-2019 Venetian and Aria motorhomes because brake caliper mounting bolts were not tightened enough and can loosen. If those bolts loosen, braking performance can drop and crash risk increases; the dealer repair will be free once Thor Motor Coach opens the final remedy.
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What's wrong?
The brake caliper on 2017-2019 Thor Motor Coach Venetian and Aria motorhomes is the clamp assembly at the wheel that presses the brake pads against the disc rotor. The caliper has to stay fixed in the correct position so the pads apply evenly when the brake system sends pressure to the wheel.
On affected motorhomes, the caliper mounting bolts were not tightened enough during production. Those bolts hold the caliper to its mounting bracket. When they loosen, the caliper is no longer held firmly, so the brake hardware can shift instead of staying aligned with the rotor.
There is no warning sign before failure. A driver should not count on noise, vibration, or a dashboard light to appear before the loose caliper bolts create a braking problem.
Who's affected?
Spans the Venetian and Aria lines across the 2017-2019 model years, all tied to the same hydraulic brake system component.
| 2019 Thor Motor Coach Venetian | hydraulic brake system |
|---|---|
| 2018 Thor Motor Coach Venetian | hydraulic brake system |
| 2017 Thor Motor Coach Venetian | hydraulic brake system |
| 2017 Thor Aria | hydraulic brake system |
| 2018 Thor Aria | hydraulic brake system |
| Units affected | 175 |
| 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?
Loose brake caliper mounting bolts can reduce braking performance and increase the risk of a crash. Until the bolts are inspected and tightened, drive cautiously and leave extra stopping space. Schedule the recall inspection soon. Repair will be free at any franchised Thor Motor Coach dealer once Thor Motor Coach opens it.
What should I do?
- Check your VIN to confirm your 2017-2019 Thor Motor Coach Venetian or Aria motorhome is included in this recall.
- Contact Thor Motor Coach customer service at 1-877-855-2867 to confirm current repair timing and reference recall number 18V507.
- Ask which authorized Daimler Trucks service center will inspect the brake caliper mounting bolts and tighten them to the proper specification free of charge once the remedy opens.
- Bring the recall notice if Thor Motor Coach mailed one, or give the service center recall number 18V507 when you call.
- Drive cautiously until the brake caliper mounting bolts are inspected and tightened. Leave extra following distance and avoid hard braking.
What happens at the repair
Until Thor Motor Coach opens the final dealer repair, follow the owner notice and keep your service appointment request tied to recall 18V507. Once the repair is available, a Thor Motor Coach technician will inspect the brake caliper mounting bolts and tighten them to the proper specification. Parts and labor are covered under the recall. Thor Motor Coach has a general reimbursement plan on file for owners who already paid for the same repair. Bring documentation for the prior brake caliper bolt work and ask the service desk how to submit it.
| Reimbursement | Reimbursement available |
|---|
Timeline
| August 2, 2018 | NHTSA published the recall |
|---|---|
| September 4, 2018 | Owner notification mailed |
Frequently asked questions
What is recall 18V507?
Recall 18V507 covers 175 2017-2019 Thor Motor Coach Venetian and Aria motorhomes with brake caliper mounting bolts that were not tightened enough. Loose bolts can reduce braking performance and increase crash risk. Authorized Daimler Trucks service centers inspect and tighten the bolts for free.
What should I do if my 2017-2019 Thor Motor Coach Venetian or Aria is on this recall?
Check your VIN to confirm your specific motorhome is included in recall 18V507. If it is, contact Thor Motor Coach at 1-877-855-2867 or an authorized Daimler Trucks service center and reference recall RC000159. The brake caliper bolt inspection and tightening are free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to provide the recall repair at no cost. For recall 18V507, authorized Daimler Trucks service centers inspect the brake caliper mounting bolts and tighten them to the proper specification free of charge.
What is the safety risk?
The safety risk is reduced braking performance. If the brake caliper mounting bolts loosen, the brake system does not perform as intended, increasing crash risk. Confirm your VIN first, then arrange the free inspection and bolt-tightening work if your motorhome is included.
When were owners notified about recall 18V507?
Thor Motor Coach began the recall on September 4, 2018. If you bought the motorhome used or never received a letter, the VIN still decides whether the recall applies. Check your VIN and reference recall RC000159 when you contact Thor Motor Coach or the service center.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/18V507000 |
|---|---|
| Thor Motor Coach customer service | 1-877-855-2867 |
| NHTSA recall # | 18V507 |
| NHTSA recall # (full) | 18V507000 |
Source documents
-
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 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →