# Service bulletin TSB\-54\-104\-WST

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.

- Type: Service bulletin
- NHTSA id: 11029529
- Published by NHTSA: 2026\-03\-04
- Manufacturer's number: TSB\-54\-104\-WST
- Manufacturer's date: 2026\-02\-18
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

Technical Service Bulletin for ESC warning lamp and ECU replacement

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029529-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029529-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2022 to 2026 WESTERN STAR 47X
- 2022 to 2026 WESTERN STAR 49X

JSON: [/v1/bulletins/11029529](/v1/bulletins/11029529)

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