Problems owners report
Complaints filed with NHTSA about the 2020 Western Star 5700, by the system named in each complaint. One complaint can name several.
- Forward collision avoidance1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
Fatal crashes in the US
From 2020 to 2023, 9 2020 5700 vehicles were involved in crashes on US public roads in which someone died; 3 people died inside them, and 1 of the vehicles rolled over. This is a count, not a crash rate: it grows with the number of cars on the road.
NHTSA Fatality Analysis Reporting System (FARS), crash years 2020–2023 (public domain)
New York safety inspections
At its first New York inspection the 2020 Western Star 5700 failed the safety check 1.05% of the time — 11% less often than the average 2020 passenger car (1.18%). Median odometer at inspection: 305,407 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Recalls in Canada
5 Transport Canada recalls for the 2020 Western Star 5700.
| 2021172 24 Mar 2021 | Electrical Issue: On certain trucks, an undersized wire in the ground circuit harness could overheat and melt a connector. If this happens, the engine may stall and you … |
| 2020217 18 May 2020 | Electrical Issue: On certain trucks, an undersized wire in the ground circuit harness could overheat and melt a connector. If this happens, the engine may stall and you … |
| 2020086 3 Mar 2020 | Brakes Issue: On certain trucks equipped with air disc brakes, the brake caliper mounting bolts may not be properly tightened. This could cause the caliper bolts to … |
| 2019552 4 Nov 2019 | Structure Issue: On certain trucks, the strut-rod for the sleeper cab vent windows may not be properly attached. This could cause the vent window to over rotate and det… |
| 2019508 10 Oct 2019 | Structure Issue: On certain trucks, the baggage and/or sleeper side doors may not be properly attached to their hinges. This could cause the door(s) to detach while dri… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
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."
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.
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.
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.
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.
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.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Western Star told its dealers about the 2020 Western Star 5700: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 11011082 | CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| 11011076 | Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates |
| 11010186 | CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| 11010143 | Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines |
| 11008508 | Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines |
| 11007517 | CX Advocate for ConMet Oil Pan Insert Additional Failures |
| 11007487 | Important Campaign Information letter for DDC D23M3 - Campaign Reactivated and Extended. Field Service Campaign D23M3 - GHG17 DETROITTM DD16 Vibration Damper Replacement has been extended for an additional 6 months. |
| 11005500 | CX Advocate for NOx conversion low faults. Update to CXA 6_24_NOx submission. |
| 11005494 | CX Advocate for ConMet Oil Pan Insert Additional Failures |
| 11003924 | CX Advocate communication for clutch bolts |
| 11003889 | CX Advocate communication for NOx conversion low faults |
| 11001976 | Customer letter regarding variable speed water pump. |
| 11000978 | Technical Service Bulletin for New Final Drive Over Heat Diagnostic |
| 10253879 | Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller |
| 10214907 | Updated Western Star Service Bulletin for HVAC Actuator Replacement |
| 10210548 | Important Campaign Information Letter for DDC D21M1 Termination Date Extended. This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an additional three months. Please use the extended termination date for all work under D21M1 from this point forward. REVISION: D21M1 termination date extended to July 1, 2022. |
| 10208391 | Western Star Service Bulletin for DEF Connector Reinforcement Caps |
| 10207520 | Revised Western Star Service Bulletin for Pana-Pacific 540 Radio Controls Not Operating Normally. Minor note: added an update of document previously submitted. The related VMRS codes are added |
| 10207507 | Revised Western Star Service Bulletin for Drive Line Vibration. Minor note: added an update of document previously submitted. The related VMRS codes are added |
| 10202728 | SF626 Western Star Window Replacement Inspection Notification. This letter is to inform you that Field Service Campaign SF626 Western Star Window Replacement Inspection Notification campaign was released. |
| 10198595 | Western Star Service Bulletin for Key Fob ID Retention. Key fobs for remote keyless entry on Western Star vehicles are delivered in packages that include a unique ID for the fob. The ID is required when pairing the key fob with a vehicle. |
| 10198288 | Western Star Service Solution for Low Voltage Disconnect (LVD) Troubleshooting: Western Star 5700 and New 4700. |
| 10195575 | Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform... |
| 10194820 | Tech Talk Discussion No comms with CPC, MCM or ACM |
| 10193767 | Removable Front Tow Hook Changes |
NHTSA manufacturer communications (public domain)
NHTSA investigations
Automatic Emergency Braking Errors
Automatic Emergency Braking Errors
NHTSA Office of Defects Investigation