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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By component
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Only bulletins with component: Wiring and fuses are shown. Show all
| DOC-1033333 | 2018-10-29. Service bulletin. ELECTRICAL SYSTEM:WIRING; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. SS 1033333 - WST ECC Replacement Jumper Harness Installation. |
|---|---|
| 503-14 | 2018-06-18. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT. 503-14 FMI 3, 4: High Side Digital Output 3 Circuit Failed High |
| SF514 | 2018-02-12. Service bulletin. ELECTRICAL SYSTEM:WIRING. Western Star ABS Wiring - Export Only |
| 14CSA22 | 2017-11-17. Service bulletin. ELECTRICAL SYSTEM:WIRING. 14CSA22 DTNA Chassis Wiring Diagrams |
| SB-54-58 | 2014-12-24. Service bulletin. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. WESTERN STAR: INSTRUCTIONS PROVIDED TO HELP REDUCE VIBRATION ON POWER DISTRIBUTION MODULES (PDM), TO PREVENT CRACKING OF FUSES ON HORIZONTALLY MOUNTED POWERTRAIN. *PE UPDATED 03/02/15*LJ |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.