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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
0606-172019-04-01. Service bulletin. ENGINE. SPN 3226 (ACM) (GHG17)
0607-172019-04-01. Service bulletin. FUEL SYSTEM, DIESEL. SPN 96 (MCM) (GHG17)
0609-172019-04-01. Service bulletin. ENGINE. SPN 3226 (ACM) (GHG17)
0603-172019-04-01. Service bulletin. FUEL SYSTEM, DIESEL. Fuel System Integrity Check Routine - Two-Filter Fuel System
0608-172019-04-01. Service bulletin. FUEL SYSTEM, DIESEL. Diagnostic tests - Two Filter System - FSIC Leak Test
0604-172019-04-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. SPN 712 (CPC) (GHG17)
ICI18-035 FL7662019-04-01. Service bulletin. EQUIPMENT. Important Campaign Information to Dealer on FL766 ? Final Remedy Temporarily Suspended
DOC-10341712019-04-01. Service bulletin. SUSPENSION. SS 1034171 Airliner Rear Suspension Chassis Lean Troubleshooting
0606-172019-03-25. Service bulletin. EQUIPMENT; ENGINE. SPN 3226 (ACM) (GHG17)
0607-172019-03-25. Service bulletin. EQUIPMENT. SPN 96 (MCM) (GHG17)
0609-172019-03-25. Service bulletin. EQUIPMENT; ENGINE. SPN 3226 (ACM) (GHG17)
0603-172019-03-25. Service bulletin. EQUIPMENT; FUEL SYSTEM, DIESEL. Fuel System Integrity Check Routine - Two-Filter Fuel System
0608-172019-03-25. Service bulletin. EQUIPMENT. Diagnostic tests - Two Filter System - FSIC Leak Test
0604-172019-03-25. Service bulletin. EQUIPMENT. SPN 712 (CPC) (GHG17)
18TL182019-03-18. Service bulletin. SERVICE BRAKES. 30mm Air Disc Brake Caliper Bolt Torque Adapter DSNCHA018005
cal540012019-03-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Customer Advisory Letter- Battery Power Cable Routing
FL7942019-03-18. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER. FL794 Brake Caliper Mounting Bolts Dealer Bulletin
FL7942019-03-11. Service bulletin. SERVICE BRAKES, AIR:DISC:CALIPER. Brake Caliper Mounting Bolts
ICI19-002 D18M7-2019-03-11. Service bulletin. STEERING. D18M7 ? Replaced by Recall D18R7 (FL802)
DOC-10332152019-02-19. Service bulletin. VISIBILITY:WINDSHIELD. DOC-1033215 Windshield Aesthetic Inside Trim not Secured Correctly or Loose
1001-18 Engine R2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. Engine Replacement Procedures
sbw0015 Vibratio2018-12-10. Service bulletin. SUSPENSION. Vibration and Harsh ride Troubleshooting
18-032-NoDefectF2018-12-10. Service bulletin. ELECTRICAL SYSTEM. Warranty Bulletin for charge back exemtions
FL766 Western St2018-12-10. Service bulletin. ELECTRICAL SYSTEM. Recall Bulletin FL766- Western Star Power Cable Studs
ICI18-031 FL7662018-12-10. Service bulletin. EQUIPMENT. Important Campaign Information- FL766 Interim Recall Ending ? Final Recall to Begin

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