2021 Western Star and Freightliner trucks recalled for brake caliper mounting defect
Commercial trucks from multiple manufacturers may have incorrectly tightened brake caliper mounting bolts, reducing braking effectiveness. Daimler Trucks North America will notify owners for free inspection and repair.
What this means for you
Real risk of harm even if no illness or injury has been reported yet. Stop using the product and follow the agency's guidance.
Our severity reasoning: The recall involves a critical brake system component with potential for failure and crash risk. However, no crashes, injuries, or deaths have been reported. This qualifies as a high-risk product defect with no reported incidents.
Plain-English summary
Daimler Trucks North America is recalling 133 commercial trucks from 2021 with a brake caliper mounting defect. The recall affects Western Star 4700 and 5700 models, Freightliner Business Class M2 and Cascadia models, and Custom Chassis XC models.
On these vehicles, one of the six brake caliper mounting bolts on the driver side steer axle may have been incorrectly tightened during manufacturing. A loose bolt could allow the other mounting bolts to loosen, reducing the clamping force that holds the brake caliper to the anchor plate.
Reduced clamping force decreases brake effectiveness, increasing the risk of a crash. Daimler Trucks North America will notify owners, and authorized dealers will inspect and repair the mounting bolts free of charge. The recall began March 17, 2021. Owners can contact DTNA customer service at 1-800-547-0712, the NHTSA Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or visit www.safercar.gov.
The recalled product
- Product
- 2021 WESTERN STAR 4700
- Brand
- WESTERN STAR
- Manufacturer
- Daimler Trucks North America, LLC
- Hazard
- brake-mounting-defect
- reduced-braking
- crash-risk
- Affected units
- 133
Is your product affected?
Check your packaging against the codes below. If any of them match, the product is part of this recall.
Model numbers (9)
- 4700
- 5700
- BUSINESS CLASS M2
- CASCADIA
- XCR
- XCL
- XCS
- XCP
- XCM
Distribution
Distributed nationwide across the United States.
Related recalls
Same brand · WESTERN STAR
- High
- HighWestern Star 47X and 49X Trucks Battery Stud Defect Fire Risk
NHTSA · 2026-11-06
- High
- SevereTruck brake caliper bolts may loosen, causing brake failure
NHTSA · 2025-12-09
- Severe
Same category
- High
- HighFord F-250 SD windshield wiper arm failure recall 2022–2023
NHTSA · 2028-07-03
- Severe2025–2026 Ford Bronco Sport and Maverick Occupant Sensor Recall
NHTSA · 2028-07-03
- Severe2026 Ford Explorer and Mustang Engine Piston Circlip Defect Recall
NHTSA · 2028-07-03
- Severe