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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
0140-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 0140-17 Turbocharger Compressor Outlet Pipe
0139-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING. 0139-17 Coolant Housing
0138-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0138-17 GHG17 DD5 Medium Duty - Exhaust and EGR - EGR Delivery
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)
0136-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 0136-17 GHG17 DD5 Medium Duty - Exhaust and EGR - Turbocharger Oil
0135-172018-04-16. Service bulletin. SERVICE BRAKES; ENGINE. 0135-17 Diagnostic Test - Engine Brake Test Procedure
0134-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0134-17 Medium Duty - DD5 GHG17 - Exhaust and EGR - EGR Cooler Lower Bracket
0129-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0129-17 SPN 102 (MCM) (GHG17)
0126-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 0126-17 SPN 520295 (MCM) (GHG17) - Smart Remote Actuator 1
0125-172018-04-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0125-17 SPN 4817 (MCM) (GHG17)
0123-172018-04-16. Service bulletin. ENGINE. 0123-17 SPN 1483 (CPC3) (GHG17)
0122-172018-04-16. Service bulletin. ENGINE. 0122-17 SPN 521058 (CPC3) (GHG17)
0121-172018-04-16. Service bulletin. ENGINE. 0121-17 SPN 521050 (CPC3) (GHG17)
0120-172018-04-16. Service bulletin. ENGINE. 0120-17 Diagnostic Test - Engine Oil Leaks - Oil Developer Method
0119-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0119-17 SPN 3217 (MCM) (GHG17)
0116-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0116-17 SPN 4752 (MCM) (GHG17) - EGR Cooler Efficiency Fault Codes
0107-172018-04-16. Service bulletin. ENGINE. 0107-17 Diagnostic Test - Engine Oil Leaks - Oil Developer Method
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
0504-162018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Inspection of the DD13 Turbocharger
15TS32018-03-05. Service bulletin. ENGINE AND ENGINE COOLING. 15TS3 Detroit? Coolant Change From Nitrite Organic Acid Technology
15TS102018-03-05. Service bulletin. ENGINE AND ENGINE COOLING. 15TS10Rev DD Engine Platform Coolant Filter
sbw20232018-03-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. sbw2023 Modine Copper/Brass Bolted Downflow Radiator Rebuilding
15-0092018-03-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE. 15-009 New Detroit Standard Diagnostic Times
14TL22018-02-12. Service bulletin. ENGINE. 14TL2 DD Platform Engine Stand Adapter W060589023100
14TS182018-02-12. Service bulletin. ENGINE. 14TS18 GHG14 DD Engine EGR System Fault Code

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