Technical Service Bulletin SF659 — 2021 WESTERN STAR 49X
POWER TRAIN
Bulletin Details
| TSB ID | SF659 |
| Manufacturer | |
| Vehicle | 2021 WESTERN STAR 49X |
| Component | POWER TRAIN |
| Communication Date |
Bulletin Summary
Field Service Campaign for Western Star 47X and 49X Maintenance System Update. On certain vehicles, the maximum driving distance parameter that prompts notification to change the transmission oil is set incorrectly. The parameter is set to provide an indicator no later than 965,400 km (approx. 600,000 mi), when it should have been set to provide an indicator no later than 300,000 km (approx.186,000 mi).
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2021 WESTERN STAR 49X
TSB-26-006-WST
POWER TRAIN
CXA_10_25_Conmet Oil Pan
ENGINE
MYCOM_09022025-1
FUEL/PROPULSION SYSTEM
TSB54-100-WST
ELECTRICAL SYSTEM
CXA 3_25_SAS01T to SAS03T
STEERING
SS771-WST
SUSPENSION
SF656
SUSPENSION
SS714-WST2022
VISIBILITY
SS726-WST2022
EXTERIOR LIGHTING
SF652
LANE DEPARTURE