AI Damage2021 Western Star 4800: common problems
The maker issued 53 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 53
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Equipment | 0 | 0 | 29 |
| Engine and cooling | 0 | 0 | 15 |
| Electrical system | 0 | 0 | 6 |
| Visibility | 0 | 0 | 6 |
| Powertrain | 0 | 0 | 4 |
| Steering | 0 | 0 | 3 |
| Fuel system | 0 | 0 | 2 |
| Service brakes | 0 | 0 | 2 |
| Suspension | 0 | 0 | 2 |
| Electronic stability control | 0 | 0 | 1 |
| Engine | 0 | 0 | 1 |
| Lane departure | 0 | 0 | 1 |
| Structure | 0 | 0 | 1 |
Comparison
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Visibility. Wipers, mirrors, defrosters, cracked glass.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Customer letter regarding variable speed water pump
- HVAC Actuator Wiring Harness. Revision History
Service kit part number changed from RDH RD5 17147 0 to WWS RD-3-9069-0 on 12/9/21. The wiring harness of the actuator of the fresh air recirculation door, shown in Fig. 1, on Western Star vehicles equipped with Red…
- 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.
- Customer Advisory Letter for HVAC Actuator Wiring Harness
The wiring harness of the actuator of the fresh air recirculation door, shown in Fig. 1, on Western Star vehicles equipped with Red Dot HVAC systems should be inspected for signs of water intrusion and corrosion.
- Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform
- Portland Truck Plant Paint Changes
- Electronic Stability Control Requirement for US and Canadian Tractors
- Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats
This bulletin replaces the version dated February 12, 2021. Information about parts notes in the Paragon system have been added and the trimming instructions are revised. Universal floor mat designs fit multiple cab…
- Western Star Service Bulletin for Powernet Troubleshooting Guide - Batteries, Path, Alternator, and Starter
When troubleshooting powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter is the only Daimler-approved tool for troubleshooting vehicle Powernet issues.
- Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available
Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops & OEM locations are required to maintain the latest version of software on each of their stations.
- Western Star Parts Technical Bulletin for Universal Design Floor Mats
Universal floor mat designs fit multiple cab configurations and may require trimming. Trim lines displaying size options are scored into the pad side of the mat; use an existing floor mat as a guide for optimal…
- Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to…
Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to dealers for travel to a customer's location to perform a recall or field service campaign. Potential travel…
NHTSA lists 53 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Western Star 4800?
There are no owner complaints in the NHTSA data for this year; the data comes from 53 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Western Star 4800?
NHTSA lists 53 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Western Star 4800 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.