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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
HDEP PLV Return2018-12-10. Service bulletin. FUEL SYSTEM, GASOLINE. Service information Bulletin -HDEP PLV Return Line Tool DSN470E17006
Emission Recall2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Emission Recall D18R5 GHG17 DD Platform Model Years 2016-2018 Software Reprogramming For California Onboard Diagnostics
D18M2 GHG17 Detr2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign D18M2 GHG17 Detroit? DD13® Software Reprogramming and Emission Label Replacement for Motor Coach Industries, Inc. (MCI®)
DOC-10332562018-12-10. Service bulletin. SUSPENSION. Service Solution for Western Star 4900, Frame Beaming - Rough Ride Vibration in bob tail mode
Aftertreamtent F2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT. Service Information Bulletin for Aftertreamtent Failure Guide
DD13, DD15, DD162018-12-10. Service bulletin. ELECTRICAL SYSTEM. DD13, DD15, DD16 Check Engine Light Flashing or Blinking
18-029 Auto Mete2018-12-10. Service bulletin. EQUIPMENT. Important Warranty Information on AutoMeter BCT-460DTNA Powernet Assessment Tool: Warranty Requirement and Claim Filing
0805-18 SPN 52102018-12-10. Service bulletin. EQUIPMENT. Service Information Bulletin
0804-18 SPN 14832018-12-10. Service bulletin. EQUIPMENT. Service Information Bulletin
0803-18 SPN 30312018-12-10. Service bulletin. EQUIPMENT. Service Information Bulletin
DOC-10336992018-12-10. Service bulletin. POWER TRAIN. TS 1033699: DT12 Transmission Driver Interview: Shifting Complaint Questionnaire
DOC-10337682018-12-10. Service bulletin. SERVICE BRAKES. TS 1033768: Western Star Front Brake Squeal - Burnishing Procedure
D18M3-REV1 Heavy2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign D18M3-REV1 Heavy Duty Engine Platform Oil Suction Manifold
FL772 Brake Cali2018-12-10. Service bulletin. WHEELS. FL772-Dealer bulletin for Brake Caliper Mounting Bolts recall
ICI18-022 FL7732018-12-10. Service bulletin. EQUIPMENT. FL773 ? Interim Recall Notice
sbw00142018-12-10. Service bulletin. EQUIPMENT. Operating Hours for the Customer Assistance Center
DOC-10334622018-12-10. Service bulletin. VISIBILITY. SS 1033462 - WST Cab Mounted Mekra Mirror Cover Chrome Peeling
DOC-10334462018-12-10. Service bulletin. POWER TRAIN. Vehicles with Meritor drivelines bene from a softer durometer center bearing support. Vehicle will continue to have a 1st order driveline vibration after the driveline assembly was rebalanced.
DOC-10334172018-12-10. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS. SS 1033417: WST 4900 Low Max w/Disc Brakes Front Brake Hose rubbing Hood fender
DOC-10334032018-12-10. Service bulletin. VISIBILITY/WIPER; VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR. SS 1033403 - WST Wiper Motor not Parking Issues
DOC-10331942018-12-10. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES. SS - 1033194 WST 4900FA Cab Mounting Crossmember Interfering with Battery Cables Heat Shield
MY18M42018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE. MY18M4_Bulletin_02-MAY-2018 Field Service Campaign D18M4
aeo18M42018-12-10. Service bulletin. POWER TRAIN. aeo18M4 Field Service Campaign D18M4
0508-182018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0508-18 Aftertreatment
0505-182018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low

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