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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

Bulletins, newest first
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
0133-172018-04-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 0133-17 SPN 625 (CPC) (GHG17)
0132-172018-04-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 0132-17 SPN 521005 (CPC3) (GHG17)
0131-172018-04-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 0131-17 SPN 521054 (CPC3) (GHG17)
0130-172018-04-16. Service bulletin. POWER TRAIN. 0130-17 SPN 520211 (IPPC) (GHG14) SPN 520211 (IPPC) (GHG17)
0129-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0129-17 SPN 102 (MCM) (GHG17)
0127-172018-04-16. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES; FUEL SYSTEM, OTHER. 0127-17 SPN 1077 FMI 14 (GHG14) (GHG17) (MCM)
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)
0124-172018-04-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). 0124-17 SPN 3720 FMI 14 - (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
0111-172018-04-16. Service bulletin. FUEL SYSTEM, DIESEL. 0111-17 SPN 1077 (MCM)(GHG17)
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
0527-172018-03-13. Service bulletin. EQUIPMENT:ELECTRICAL. FMI 3,4,5 Digital Output 1 13 Circuit
0513-162018-03-13. Service bulletin. VEHICLE SPEED CONTROL:ACCELERATOR PEDAL. FMI 2, 3, 4 Remote Accelerator Pedal Supply Voltage
0504-162018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Inspection of the DD13 Turbocharger

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