Recall 14V758 affects 1,580 2015 Western Star trucks for brake chamber diaphragm defects causing brake drag. Repair is free at any franchised Western Star dealer.
Western Star is recalling 1,580 2015 trucks, including the 4700, under recall 14V758 because Haldex Life Seal brake chambers can drag from an improperly seated diaphragm. Brake drag at highway speeds can cause loss of vehicle control and increase crash risk; the dealer repair will be free once available.
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What's wrong?
The brake chamber on these 2015 Western Star trucks is part of the air disc brake system. It uses air pressure to move an internal diaphragm, which then helps apply or release braking force at the wheel. When the chamber works correctly, the brake applies when commanded and releases cleanly afterward.
In this recall, the affected trucks were equipped with Haldex Life Seal brake chambers. The diaphragm inside the chamber was not seated correctly. Because that diaphragm is out of position, the brake does not release as designed and brake drag can occur, meaning the brake stays partly applied after the driver releases the pedal.
There is no warning sign before failure. Once brake drag is present, the driver can feel the truck pulling, notice reduced power, or find that a wheel area feels hotter than normal after driving.
Who's affected?
Covers 9 model lines from the 2015 model year, all tied to the same brake system component.
| 2015 Western Star 4700 | brake system |
|---|---|
| 2015 Freightliner Columbia Glider | brake system |
| 2015 Freightliner 108SD | brake system |
| 2015 Freightliner Coronado | brake system |
| 2015 Freightliner 122SD | brake system |
| 2015 Western Star 4900 | brake system |
| 2015 Freightliner 114SD | brake system |
| 2015 Freightliner Argosy Glider | brake system |
| 2015 Freightliner Business Class M2 | brake system |
| Units affected | 1,580 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Brake drag at highway speeds can lead to loss of vehicle control and increase the risk of a crash. The recall filing does not list a warning sign, so drive cautiously and schedule the inspection soon if your VIN is included. Repair will be free at any franchised Western Star dealer once available.
What should I do?
- Check your VIN to confirm whether your 2015 Western Star 4700, Columbia Glider, 108SD, Coronado, 122SD, 4900, 114SD, Argosy Glider, or Business Class M2 is included in this recall.
- Contact a franchised Western Star dealer after confirming your VIN and ask about the free brake-chamber inspection and diaphragm repair.
- Reference recall number 14V758 and Western Star recall FL-676 when you call.
- Bring the recall notice if you have it, along with any service records tied to brake drag or brake-chamber work.
- Drive cautiously until the repair is complete. Brake drag at highway speed can lead to loss of vehicle control.
What happens at the repair
At the dealer, a Western Star technician inspects the Haldex Life Seal brake chamber diaphragm for improper seating and repairs the diaphragm when the inspection shows it needs repair. The source does not list the remedy as currently available, so the dealer repair will be free once available. The work is tied to brake drag from the brake chamber diaphragm, so the service visit focuses on that brake chamber component rather than a broad brake system replacement.
Timeline
| November 28, 2014 | NHTSA published the recall |
|---|---|
| September 25, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 14V758?
Recall 14V758 covers 1,580 2015 Western Star trucks equipped with Haldex Life Seal brake chambers. An improperly seated diaphragm can cause brake drag, and brake drag at highway speeds can cause loss of vehicle control. Dealers will inspect and repair the diaphragm for free.
What should I do if my 2015 Western Star truck is on this recall?
Check your VIN to confirm your specific truck is included in recall 14V758. If it is, contact a franchised Western Star dealer to schedule the brake chamber inspection and diaphragm repair. Reference DTNA recall number FL-676 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the recall remedy says dealers will inspect and repair the brake chamber diaphragm if needed free of charge. Use recall number 14V758 or FL-676 when scheduling service.
What is the safety risk?
The safety risk is brake drag that can lead to loss of vehicle control at highway speeds. The recall does not list a do-not-drive order, but a confirmed included truck needs dealer service. Ask the dealer whether the truck should be driven or moved by towing.
When were owners notified about recall 14V758?
Owners were sent an interim notice on January 27, 2015, and the recall began on September 25, 2015. If you bought the truck used or never received a letter, check your VIN and call a Western Star dealer with recall number 14V758.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/14V758000 |
|---|---|
| Western Star customer service | 1-800-745-8000 |
| NHTSA recall # | 14V758 |
| NHTSA recall # (full) | 14V758000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 1, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →