Service bulletins for the 2006 Western Star 4900
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.
176 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Turbocharger or supercharger are shown. Show all
| 0504-16 | 2018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Inspection of the DD13 Turbocharger |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.