WenmarOpen by Wenmar Pro

Service bulletins for the 2011 Western Star 4800

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.

177 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
sbw49102018-01-16. Service bulletin. ENGINE. sbw4910 Gentech DEF Coolant-Flow Solenoid, Testing and Replacement
15-028A2018-01-05. Service bulletin. ENGINE AND ENGINE COOLING. 15-028 New Detroit Coolant Line SRTs
0228-142018-01-05. Service bulletin. ENGINE. 0228-14 Engine Oil Leaks - Oil Dye Method
0229-142018-01-05. Service bulletin. ENGINE. 0229-14 Symptom Based Diagnostics - Oil Separator
49-142018-01-05. Service bulletin. ENGINE AND ENGINE COOLING. 49-14 - DEF Tank Coolant Valve O-Ring Kit
14-040A2017-11-17. Service bulletin. ENGINE. 14-040_Additional_CLOs Additional Detroit CLOs for the Heavy Duty Engine Platform
1005-142017-11-17. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. 1005-14 Oil Coolant Module
14-0402017-11-17. Service bulletin. ENGINE. 14-040 Additional Detroit CLOs for the Heavy Duty Engine Platform
sb20802017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. sb2080 Australian CST M1400 Isolated Radiator Retrofit
20-182017-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. 20-18 - Western Star 4800 and 4900 Radiator Mounting, Update?EPA10

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.