AI Damage2021 Western Star 4700: common problems
The maker issued 108 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 108
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Equipment | 0 | 0 | 38 |
| Engine and cooling | 0 | 0 | 29 |
| Engine | 0 | 0 | 17 |
| Powertrain | 0 | 0 | 13 |
| Electrical system | 0 | 0 | 12 |
| Visibility | 0 | 0 | 9 |
| Steering | 0 | 0 | 8 |
| Suspension | 0 | 0 | 4 |
| Service brakes | 0 | 0 | 3 |
| Fuel system | 0 | 0 | 2 |
| Structure | 0 | 0 | 2 |
| Electronic stability control | 0 | 0 | 1 |
| Fuel/propulsion system | 0 | 0 | 1 |
| Tires | 0 | 0 | 1 |
Comparison
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
- CX Advocate for discolored coolant surge tanks (24CSA-20)
- Technical Service Bulletin for TufTrac M12 Bolts
- CX Advocate for ConMet Oil Pan Insert Additional Issues
- Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
- Parts Bulletin for Tie Rod Assembly Part Breakdown
- CX Advocate for NOx conversion low faults
- Service Solution for Power Steering Reservoir Fill Cap Venting
- Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair…
- Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
- Customer Service Annoucement for Discolored Coolant Surge Tank on Heavy Duty Engine Product (HDEP)
- Customer Service Annoucement for Heavy-Duty Engine Product (HDEP) Oil Separator Leaks
NHTSA lists 108 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 4700?
There are no owner complaints in the NHTSA data for this year; the data comes from 108 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Western Star 4700?
NHTSA lists 108 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 4700 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.