Western Star recall 20V127 covers 2,585 2019-2020 vehicles for loose brake caliper bolts. Repair is free at any franchised Western Star dealer.
Western Star is recalling 2,585 2019-2020 vehicles, including 4700, 5700, Business Class M2, and Cascadia models, because air disc brake caliper mounting bolts were not tightened enough. Loose caliper bolts can reduce brake effectiveness and increase crash risk, and Western Star dealers will complete the repair free of charge.
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What's wrong?
The air disc brake caliper on the 2019-2020 Western Star commercial vehicles is the part at the wheel end that squeezes the brake pads against the disc. When the driver presses the brake pedal, air pressure moves the brake mechanism, and the caliper turns that pressure into stopping force. The mounting bolts hold the caliper in the correct position so the pads press evenly against the disc.
On affected vehicles, those caliper mounting bolts were not tightened to the required level during axle assembly at the York Axle Manufacturing Plant. The plant did not have complete production data showing the tightening force for the involved calipers. A loose caliper shifts at the wheel end, damages nearby brake parts, and reduces brake effectiveness.
There is no warning sign before failure. Do not rely on a dashboard light, noise, or pedal change to tell you the caliper bolts are loose.
Who's affected?
Spans truck and chassis models across the 2019 and 2020 model years, all tied to the brake system.
| 2019 Western Star 4700 | brake system |
|---|---|
| 2019 Western Star 5700 | brake system |
| 2020 Freightliner Business Class M2 | brake system |
| 2020 Western Star 4700 | brake system |
| 2020 Western Star 5700 | brake system |
| 2019 Fccc Xbr | brake system |
| 2020 Fccc Xbs | brake system |
| 2020 Fccc S2 | brake system |
| 2019 Fccc Xbs | brake system |
| 2020 Fccc Xcl | brake system |
| 2020 Fccc Xbr | brake system |
| 2019 Fccc Xbp | brake system |
| 2019 Fccc S2 | brake system |
| 2019 Fccc Xcl | brake system |
| 2020 Fccc Xcm | brake system |
| 2020 Fccc Xcs | brake system |
| 2019 Freightliner 114SD | brake system |
| 2019 Fccc Xcr | brake system |
| 2020 Fccc Xcr | brake system |
| 2019 Fccc Xcm | brake system |
| 2019 Freightliner 108SD | brake system |
| 2020 Freightliner 108SD | brake system |
| 2020 Freightliner 114SD | brake system |
| 2019 Freightliner Business Class M2 | brake system |
| 2019 Freightliner Cascadia | brake system |
| 2020 Freightliner Cascadia | brake system |
| 2019 Fccc Xcs | brake system |
| 2020 Fccc Xbp | brake system |
| Units affected | 2,585 |
| Field incidents | NHTSA has logged 11 field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific truck.
What's the safety risk?
Loose brake caliper mounting bolts can reduce brake effectiveness, which increases the risk of a crash. Until the inspection is done, drive cautiously, leave extra stopping room, and schedule the recall repair soon. Repair is free at any franchised Western Star dealer.
What should I do?
- Check your VIN to confirm your 2019-2020 Western Star vehicle is included in this recall.
- Contact a franchised Western Star dealer to schedule the free inspection and repair.
- Schedule the air-disc-brake caliper bolt repair that fixes loose mounting bolts and protects braking effectiveness.
- Bring the recall notice if Western Star has mailed one. If not, reference recall number 20V127 when you call.
- Drive cautiously until the repair is complete. Leave extra following distance and avoid hard braking when traffic allows.
What happens at the repair
At the dealer, a Western Star technician inspects the air disc brake caliper mounting bolts and repairs the brake assembly as needed. The recall repair is free, with parts and labor covered. DTNA uses its general reimbursement plan on file for this recall. If you already paid out of pocket for a related brake caliper bolt repair, bring documentation to the service desk or contact DTNA customer service to start a reimbursement claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| March 3, 2020 | NHTSA published the recall |
|---|---|
| May 1, 2020 | Dealer notification began |
| May 1, 2020 | Dealer notification ended |
| May 1, 2020 | Owner notification mailed |
| May 1, 2020 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| May 1, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V127?
Recall 20V127 covers 2,585 2019-2020 Western Star vehicles equipped with air disc brakes, including the 4700, 5700, Business Class M2, and related chassis models. The brake caliper mounting bolts were insufficiently tightened, which can reduce brake effectiveness and increase crash risk.
What should I do if my 2019-2020 Western Star 4700, 5700, Business Class M2, Xbr, Xbs, S2, Xcl, Xbp, Xcm, Xcs, 114SD, Xcr, 108SD, or Cascadia is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 20V127. If it is, contact a franchised Western Star dealer to schedule the brake caliper inspection and repair. Reference recall number 20V127 or DTNA recall FL-845 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and DTNA says dealers will inspect and repair the affected vehicles free of charge. Parts and labor are covered through the recall repair at a franchised Western Star dealer.
What is the safety risk in recall 20V127?
The safety risk is reduced brake effectiveness from loose brake caliper mounting bolts. Reduced braking performance increases crash risk, especially when stopping a loaded vehicle. Confirm your VIN, then arrange the free dealer inspection and repair before relying on the vehicle for regular service.
What if I bought this vehicle used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. If you never received a notice, check your VIN to see whether this specific 2019-2020 vehicle is included, then call a franchised Western Star dealer with recall number 20V127.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V127000 |
|---|---|
| Western Star customer service | 1-800-547-0712 |
| NHTSA recall # | 20V127 |
| NHTSA recall # (full) | 20V127000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- 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 →