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Service bulletins for the 2012 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.

628 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Suspension are shown. Show all

Bulletins, newest first
SBW31-0162020-07-31. Service bulletin. SUSPENSION:REAR; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Western Star Bulletin for Non-Airliner Rear Suspension Crossmember Fastener Change. With the start of production on March 2, 2020, the fasteners used to assemble the non-Airliner rear suspension (bogie) crossmember have changed. The rear suspension bogie crossmember gussets to the C-channel will be assembled with 5/8–18 fasteners. This change includes a revision to a higher friction nut that requires an increase in tightening torque. The new higher friction nut can be identified by its green color.
SS10346212020-01-21. Service bulletin. SUSPENSION. Service Solution for Western Star vehicles equipped with Hendrickson AIRTEK Axles experiencing a Harsh Ride.
sbw00152019-04-08. Service bulletin. SUSPENSION. Service Bulletin Vibration and Harsh Ride Troubleshooting
DOC-10341712019-04-01. Service bulletin. SUSPENSION. SS 1034171 Airliner Rear Suspension Chassis Lean Troubleshooting
DOC-10332562018-12-10. Service bulletin. SUSPENSION. Service Solution for Western Star 4900, Frame Beaming - Rough Ride Vibration in bob tail mode
17TS102018-06-11. Service bulletin. SUSPENSION. Detroit? DT12? Split Rod Bushing Repair
00-152018-02-12. Service bulletin. SUSPENSION. 00-15 - Vibration and Harsh Ride Troubleshooting
17TL252018-02-12. Service bulletin. SUSPENSION. 17TL25 TruckCam? Alignment System
SB-33-042014-01-23. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING. WESTERN STAR: IT HAS BEEN RECOMMENDED, BY CONMET, THAT THE BEARING SPACER BE REPLACED WITH NEW ONE WHEN HUB IS REMOVED. MODEL 4700, 4900, 6900.. NO YEARS LISTED. *PE
35-72012-04-27. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING; SUSPENSION:MULTIPLE AXLE; POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING. WESTERN STAR: LUBRICATE WHEEL BEARINGS, REAR DRIVE AXLES. *JS

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