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Service bulletins for the 2014 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.

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

By type

By component

Only bulletins with component: Exhaust and emissions are shown. Show all

Bulletins, newest first
302-152018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE. 302-15 Crankshaft Oil Seals
305-152018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 305-15 EPA10 Diesel Oxidation Catalyst Inlet Pressure Sensor
14TS132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE. 14TS13Rev EPA10/GHG14 Diesel Exhaust Fluid (DEF) in Fuel System/Diesel Fuel in DEF System Contamination
517-142018-06-18. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 517-14 FMI 18: SCR NOx Conversion efficiency low
515-142018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 515-14 FMI 1: Over Pressurized Diesel Exhaust Fluid System
501-142018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; EQUIPMENT; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY. 501-14 Removal and Installation of the DD13 Exhaust Flanged Manifold
607-132018-06-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 607-13 SPN 3361-FMI 7- EPA10
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)
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
303-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 303-13 SPN 3242-FMI 4 -EPA10 - GHG14
109-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 109-13 SPN 3250-FMI 31 (ACM2.1) GHG14
139-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 139-13 SPN 3251-FMI 0, 16, 20, 21 GHG14
108-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 108-13 SPN 3364-FMI 18 - GHG14
129-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 129-13 DD Platform GHG 14 SPN 3361 FMI 3, 4, 5 UPDATE
146-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 146-13 SPN 4335-FMI 1 EPA10
133-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 133-13 SPN 4375-FMI 4 and 5 - GHG14
112-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 112-13 SPN 4364-FMI 18 - GHG14
111-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 111-13 SPN 4374/FMI 0, 1, 3, 4 - GHG14
110-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 110-13 SPN 5435-FMI 7 - GHG14
148-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 148-13 GHG14 DD15 Asymmetrical Turbocharger Exhaust Manifold
119-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 119-13 Exhaust Gas Recirculation System - Cleaning
126-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 126-13 Description and Operation of the DD15 and DD16 Exhaust Gas Recirculaton Cooler
124-132018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 124-13 Installation of the DD Platform EGR Actuator Pull Rod
702-152018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 702-15 DD15 and DD16 Delphi © Exhaust Gas Recirculation Valve Actuator
0137-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0137-17 SPN 3361 FMI 5 (ACM) (GHG17) SPN 3361 FMI 5 (ACM) (GHG14)

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