2020 Western Star 5700 problems, complaints & recalls
Most-reported problem areas: Forward Collision Avoidance (1)
Safety recalls (6)
Equipment:other:labels 2022-05-16 · campaign 22V338000 · 185 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2020 Freightliner Cascadia, 2020-2022 Western Star 4700 and 5700, 2022 Western Star 4900, and 2020-2023 Freightliner New Cascadia vehicles. The Gross Axle Weight Rating (GAWR) listed on the Federal Certification Label is incorrect, which can allow the vehicle to be overloaded. As such, these vehicles fail to comply with the requirements of 49 CFR Part 567, "Certification."
Risk: An overloaded vehicle can increase the risk of a crash.
Fix: Dealers will be replace the GAWR labels, free of charge. Owner notification letters were mailed July 14, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-933.
Electrical System:wiring 2021-03-24 · campaign 21V206000 · 5,111 vehicles
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2019-2021 Western Star 4700 and Western Star 5700 vehicles. The ground harness wiring may be undersized and may cause a connector to melt.
Risk: Damage to the ground harness may cause an engine stall, increasing the risk of a crash.
Fix: DTNA will notify owners, and dealers will replace the ground harness, free of charge. The recall is expected to begin May 22, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-880.
Electrical System:wiring 2020-05-18 · campaign 20V281000 · 2,987 vehicles
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2019-2021 Western Star 4700 and 5700 vehicles. A particular wire in the ground harness may be undersized, possibly resulting in a melted connector in the ground circuit harness. If the connector becomes damaged, under certain circumstances, the engine may stall without the ability to restart.
Risk: An engine stall may increase the risk of a crash.
Fix: DTNA will notify owners, and dealers will replace the ground harness, free of charge. This recall began June 23, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-852.
Service Brakes, Air:disc:caliper 2020-03-03 · campaign 20V127000 · 2,585 vehicles
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2019-2020 Freightliner 108SD, 114SD, Cascadia, Business Class M2, Western Star 4700 and 5700, Freightliner Custom Chassis S2, Custom Chassis XB, and Custom Chassis XC vehicles equipped with air disc brakes. The brake caliper mounting bolts may have been insufficiently tightened.
Risk: Loose brake caliper mounting bolts can reduce brake effectiveness, increasing the risk of a crash.
Fix: DTNA will notify owners, and dealers will inspect and repair the vehicles, free of charge. The recall began May 1, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-845.
Visibility:defroster/Defogger/Hvac System:rear Window 2019-11-04 · campaign 19V792000 · 2,725 vehicles
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2016-2020 Western Star 4900 and 5700 vehicles equipped with sleeper cab vent windows. Due to improper adhesive, the vent window may detach from the vehicle.
Risk: If the vent window detaches while the vehicle is in motion, it can become a road hazard, increasing the risk of a crash.
Fix: DTNA will notify owners, and dealers will replace the vent windows, free of charge. DTNA issued owners an interim notification on December 27, 2019. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-836.
Structure:body:door 2019-10-10 · campaign 19V722000 · 2,547 vehicles
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2020 Western Star 4900 and 5700 vehicles. The adhesive bond may fail allowing the baggage or sleeper side door to separate from the hinges.
Risk: A baggage or sleeper side door that separates from the vehicle while in motion can cause road debris, increasing the risk of an injury or crash.
Fix: DTNA will notify owners and dealers will install reinforcement clips with mechanical fasteners on each baggage and sleeper door hinge, free of charge. DTNA issued owners an interim notification on December 6, 2019. The recall began September 21, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL834.
Service bulletins (159)
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.
Fuel/Propulsion System 2026-06-01 · PB-47-900-WST · Service Bulletin/Repair Instructions
parts bulletin for fluorosilicone fuel tank cap seals
Suspension 2025-10-17 · TSB-32-020-WST · Service Bulletin/Repair Instructions
technical service bulletin for tuftrac m12 bolts
Engine 2025-10-16 · CXA_10_25_Conmet Oil Pan · Other
cx advocate for conmet oil pan insert additional issues
Steering 2025-06-19 · PB33-005-WST · Service Bulletin/Repair Instructions
parts bulletin for tie rod assembly part breakdown
Power Train 2025-04-30 · TSB26-008-WST · Service Bulletin/Repair Instructions
service solution for dt12 oil plug ports
Engine 2025-03-20 · CXA 3_25_NOx · Other
cx advocate for nox conversion low faults
Showing the 6 most recent of 159 bulletins. Search all of them free at nhtsa.gov.
What owners report
2022-05-17 · Forward Collision Avoidance · 3,000 mi“the contact owns a 2020 western star 5700. the contact stated that while driving approximately 75 mph, the anti-collision system erroneously activated causing the commercial truck to abruptly stop while driving on the freeway. during the failure, there were no other vehicles or objects nearby to cause the system to be activated. the contact indicat…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.