Recall 24V013 affects 149 2023 Western Star 4900 and 6900 trucks for delayed park brake engagement. Repair is free at any franchised Western Star dealer.
Western Star is recalling 149 2023 Western Star 6900 and 4900 vehicles because a defect in the inversion valve can delay park brake engagement and let the vehicle move unintentionally. Unintentional movement increases the risk of a crash or injury, and Western Star dealers will complete the free repair.
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What's wrong?
The inversion valve on the 2023 Western Star 6900 and 4900 is a pneumatic valve in the parking brake system. In normal operation, it helps route air pressure so the park brakes apply when the driver sets them. It also releases air with the familiar exhaust sound drivers expect from an air brake system.
On affected trucks, the suspect ZF inversion valve has a defect that delays park brake engagement. That delay means the brakes do not set at the expected moment after the control is applied. Until the park brakes fully engage, the truck can move unintentionally.
The warning sign is the lack of the normal park brake exhaust noise when the driver sets the brake. If that sound is missing, treat it as a sign that the parking brake system did not respond normally.
Who's affected?
The scope points to the same parking brake inversion valve across both Western Star truck models.
| 2023 Western Star 6900 | Parking brake |
|---|---|
| 2023 Western Star 4900 | Parking brake |
| Units affected | 149 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
A delayed inversion valve can keep the park brake from exhausting normally, which can allow unintended vehicle movement and increase the risk of a crash or injury. If the normal park brake exhaust noise is missing, stop and contact a Western Star dealer before the next trip. Repair is free at any franchised Western Star dealer.
What should I do?
- Check your VIN to confirm your 2023 Western Star 6900 or 4900 is included in this recall.
- Contact a franchised Western Star dealer to schedule the free inversion-valve inspection and replacement that fixes delayed park brake engagement.
- Bring the recall notice if you have it. If not, reference recall number 24V013 and Western Star recall FL992 when you call.
- Park cautiously until the repair is complete. Keep the service brake applied until the parking brake is fully set.
What happens at the repair
At the dealer, a Western Star technician inspects the inversion valves and replaces any affected valves that need replacement. The recall repair is free, and parts and labor are covered. If you already paid for an inversion valve related repair before the recall notice, seek reimbursement through an authorized Western Star dealer. Bring the owner letter and any repair paperwork so the service desk can match the claim to recall 24V013 and DTNA recall FL992.
| Reimbursement | Reimbursement available |
|---|
Timeline
| January 10, 2024 | NHTSA published the recall |
|---|---|
| February 27, 2024 | Owner notification mailed |
| March 10, 2024 | Dealer notification began |
| March 10, 2024 | Dealer notification ended |
| March 10, 2024 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 24V013?
Recall 24V013 covers 149 2023 Western Star 6900 and 4900 vehicles with an inversion valve defect that can delay park brake engagement. That delay can allow the vehicle to move unintentionally, increasing crash or injury risk. Western Star dealers will inspect and replace the inversion valves for free.
What should I do if my 2023 Western Star 6900 or 4900 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 24V013. If it is, contact a franchised Western Star dealer to schedule the parking brake inspection. The dealer will replace the inversion valves if needed. Reference recall number 24V013 or FL992 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Western Star dealers will inspect the inversion valves and replace them if needed free of charge, including parts and labor.
What is the safety risk?
The risk is unintended vehicle movement after the park brake is applied. Recall 24V013 involves an inversion valve defect that can delay park brake engagement, which increases the risk of a crash or injury. Have the vehicle inspected by a Western Star dealer.
When were owners notified about recall 24V013?
Owner notification letters were mailed February 27, 2024. If you bought the vehicle used or never received a letter, check your VIN to confirm whether your specific 2023 Western Star 6900 or 4900 is included before scheduling service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V013000 |
|---|---|
| Western Star customer service | 1-800-547-0712 |
| NHTSA recall # | 24V013 |
| NHTSA recall # (full) | 24V013000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notice (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →