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Service bulletins for the 2018 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.

523 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
0303-172018-06-18. Service bulletin. ENGINE. (CPC)(EPA10-GHG14) and SPN 98 (CPC)(GHG17)
0301-172018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0301-17 Contaminated Fluids
sbw540652018-06-18. Service bulletin. ENGINE; EQUIPMENT. GHG17 Heavy Duty Engine Platform Vehicle Dash Oil Pressure Gauge
711-132018-06-18. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 711-13 SPN 100-FMI 4 - ALL YEARS
717-132018-06-18. Service bulletin. EQUIPMENT; ENGINE; EQUIPMENT:MECHANICAL; EQUIPMENT ADAPTIVE/MOBILITY. 717-13 Oil Pan
0203-17 SPN 57412018-06-18. Service bulletin. ENGINE. 0203-17 SPN 5741 FMI 13 (GHG17) (MCM)
0208-17 SPN 4122018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0208-17 SPN 412 (MCM) (GHG17)
0206-17 SPN 52102018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0206-17_ SPN 521049 (MCM) (GHG17)
18SP7332018-06-18. Service bulletin. ENGINE. 18SP733 GHG17 Medium Duty DD8 Oil Filter Kit
601-132018-06-18. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 601-13 Engine Oil Capacities
sbw49102018-06-18. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. sbw4910 Gentech DEF Coolant-Flow Solenoid, Testing and Replacement
0404-182018-06-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 0404-18 GHG17 DD8 - Aftertreatment Systems - Diesel Particulate Filter End Cap
0402-182018-06-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ELECTRICAL SYSTEM. 0402-18 SPN 625 (CPC) (GHG14)
DOC-10332972018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. SS 1033297: WST 4900 Low Max Exhaust Pipe Installation improvements
ssbw490192018-06-18. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. ssbw49019 Manguera de presión del líquido de escape diésel (DEF) desconectada en la conexión del dosificador
fsbw490192018-06-18. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. fsbw49019 Conduite sous pression de fluide pour échappement diesel (DEF) débranchée au niveau du raccordement du doseur
fsbw420102018-06-18. Service bulletin. ENGINE AND ENGINE COOLING. fsbw42010 Inspection d'absence de fuites d'air par les transporteurs concessionnaires
fsbw420092018-06-18. Service bulletin. ENGINE AND ENGINE COOLING. fsbw42009 Diagnostic de fuite d'air
sbw20192018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. sbw2019 Kysor Fan Clutch Rocking Runout Inspection
1110-172018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. Exhaust and Exhaust Gas Recirculation
49-0192018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. Diesel Exhaust Fluid (DEF) Pressure Line Disconnected at the Doser Connection
aeo18M12018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. aeo18M1 GHG14 Heavy Duty Engine Platform Vocational Application Programming
17TL7Rev2018-06-11. Service bulletin. ENGINE. Heavy Duty Engine Wastegate Repair Kit DKI470E16019
0401-172018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. SPN 4765 FMI 0 - Exhaust Temperature Out Of Range High
0407-172018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. GHG17 Heavy Duty- Exhaust & EGR - EGR Actuator Coolant Lines

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