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Service bulletin SBW54-090

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10222234
Published by NHTSA2022-10-04
Manufacturer's numberSBW54-090
Manufacturer's date2022-09-28
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Western Star Service Bulletin for ABS mBSP ECU Software Update Fault Code 629-11. New Cascadia vehicles manufactured from September 12, 2018 through March 22, 2021 that are equipped with WABCO Anti-Lock Braking System (ABS) controllers log excessive 629-11 fault codes, which can lead to additional downstream fault codes. The ABS controller will receive a software update to eliminate erroneous fault codes and ensure proper function.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
WESTERN STAR 47X2020 to 2022
WESTERN STAR 49X2020 to 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.