2021 Western Star 57x problems, complaints & recalls
Safety recalls (2)
Service Brakes, Air:antilock:modulator 2022-11-01 · campaign 22V817000 · 219,390 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2017-2023 Freightliner Cascadia, 2020-2022 Freightliner Business Class M2, and 2022 Freightliner 114SD, and 2020-2023 Western Star 49X, 2021-2023 Western Star 47X, and 2021-2022 Western Star 57X vehicles. The brake modulator valves on the front axle may corrode and cause the vehicle to pull to the affected side during an Adaptive Cruise Control (ACC) braking event.
Risk: Brakes that pull to one side during an ACC braking event may cause a sudden change in vehicle direction, increasing the risk of a crash.
Fix: Dealers will inspect and replace the front brake modulator valves, as necessary. Some vehicles will have a software update which will alert driver when a replacement is required. All repairs will be performed free of charge. Owner notification letters were mailed beginning October 16, 2023. DTNA's number for this recall is FL-958. This recall expands and replaces previous recall 20V-390. All vehicles previously repaired under recall 20V-390 will need to have the new remedy performed.
Structure:body 2022-04-07 · campaign 22V227000 · 2,284 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2021-2023 Western Star 47X, 2020-2023 Western Star 49X, and 2021-2022 Western Star 57X vehicles equipped with side air intakes on the hood. The stainless steel cover on the side air intake may loosen and detach from the vehicle.
Risk: A detached side air intake cover may cause a road hazard and increase the risk of a crash.
Fix: Dealers will replace the stainless steel cover, free of charge. Owner notification letters were mailed August 8, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-925.
Service bulletins (49)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2026-01-15 · CXA_01_26_Trans Support · Other
cx advocate for aftermarket transmission support
Visibility/Wiper 2025-11-06 · TSB82-003-WST · Service Bulletin/Repair Instructions
technical service bulletin for fixing unintended wiper sweep
Engine 2025-10-16 · CXA_10_25_Conmet Oil Pan · Other
cx advocate for conmet oil pan insert additional issues
Steering 2025-03-20 · CXA 3_25_SAS01T to SAS03T · Other
cx advocate for sas01t to sas03t replacement (tsb54-373-ftl, tsb54-097-wst)
Engine 2025-03-20 · CXA 3_25_NOx · Other
cx advocate for nox conversion low faults
Engine 2025-02-20 · CXA 2_25_Turbo Oil Drain · Other
cx advocate for turbo oil drain cracking
Showing the 6 most recent of 49 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.