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Service bulletins for the 2015 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.

617 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
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)
0115-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0115-17 SPN 3226 (ACM) (EPA10;GHG14)
1205-152018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. 1205-15 Selective Catalyst Reduction (SCR) Inlet Temperature Sensor
0514-162018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). Cleaning of the Exhaust Gas Recirculation Venturi Pipe Delta P Sensor Ports
512-152018-03-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 512-15 GHG14 DD15 AT Exhaust Gas Recirculation Actuator Pull Rod
503-152018-03-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 503-15 DD13 Exhaust Gas Recirculation Valve Actuator
502-152018-03-05. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 502-15 Exhaust Gas Recirculation Actuator Lever
321-152018-03-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 321-15 SPN 4364 (ACM) (GHG14)
320-152018-03-05. Service bulletin. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 320-15 SPN 4374 (ACM) (GHG14)
301-152018-03-05. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 301-15 SPN 3251 (ACM) (EPA10) and (ACM) (GHG14), 3936 (ACM)
919-142017-10-15. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 919-14 Exhaust Gas Recirculation Flow Target Error Diagnostic - High Flow
914-142017-10-15. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 914-14 Ambient and Inlet Manifold Pressure Difference (High Box)
18SP6872017-10-15. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 18SP687 18SP687 DD15/16 EGR Actuator Replacement Service Kit
08 09-162016-10-19. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0809-16 SYMPTOM DIAGNOSTICS : NOISY 1- BOX™ AFTERTREATMENT
16-0222016-08-31. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. NEW DETROIT DIESEL EXHAUST FLUID AWNING STANDARD REPAIR TIME

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