Service bulletins for the 2023 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.
35 on file from NHTSA, as of 2026-10-19.
By type
By component
| CXA 06_24_NOx | 2024-07-09. Other. ENGINE. CX Advocate communication for NOx conversion low faults |
|---|---|
| VSWP Customer Letter | 2024-06-22. Other. ENGINE. Customer letter regarding variable speed water pump. |
| SS734-WST | 2024-06-05. Other. SUSPENSION. Service Solution for Thread Spring Pin Suspension Alignment & Installation |
| SS763-WST | 2024-06-05. Other. ENGINE. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller |
| SS3144-FTL | 2024-05-07. Service bulletin. ENGINE AND ENGINE COOLING. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller |
| SF679 | 2024-03-06. Service bulletin. EQUIPMENT. Revised Field Service Campaign for Virtual Technician Module. REVISION: The parts table has been updated. |
| ICI24-004 | 2024-03-06. Service bulletin. EQUIPMENT. Important Campaign Information letter for SF679 Bulletin Revision. REVISION: The parts table has been updated. |
| SF679 | 2024-02-06. Service bulletin. EQUIPMENT. Field Service Campaign for Virtual Technician Module |
| ICI23-043 | 2023-12-06. Service bulletin. POWER TRAIN. Important Campaign Information Letter for SF680 Allison TCM Software Update / TT9108EN |
| MYCOM_03142022-2 | 2022-04-08. Service bulletin. UNKNOWN OR OTHER. Western Star Multi-Color Paint Designs - WST185 Cab/Hood paint will be limited to Paint: One Solid Color (065-000) for Western Star 4700, 4800, 4900, and 6900 models built at Portland Truck Plant. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.