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
| PB-47-900-WST | 2026-07-06. Service bulletin. FUEL/PROPULSION SYSTEM. Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals |
|---|---|
| CXA_10_25_Conmet Oil Pan | 2025-11-05. Other. ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Issues |
| CXA 3_25_NOx | 2025-04-02. Other. ENGINE. CX Advocate for NOx conversion low faults |
| CXA 2_25_NOx | 2025-03-04. Other. ENGINE. CX Advocate for NOx conversion low faults |
| CXA 1_16_NOx | 2025-01-29. Other. ENGINE. CX Advocate for NOx conversion low faults |
| D24R2-OWN LTR | 2025-01-06. Emissions. ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming |
| D24R2-DLR LTR | 2025-01-06. Emissions. ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming |
| D24R2-Bulletin | 2025-01-06. Emissions. ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming |
| CXA 10_17_Reman Process | 2024-11-07. Other. ENGINE. CX Advocate for overview of the remanufacturing process. |
| CXA 10_17_Incorrect VIN | 2024-11-07. Other. UNKNOWN OR OTHER. CX Advocate for eCascadia incorrect VIN (SF692) |
| SF679-DLR LTR | 2024-11-07. Service campaign. UNKNOWN OR OTHER. Revised Field Service Campaign for Virtual Technician Module. 2nd REVISION:Certain vehicles in Group B with Cummins engines have been reassigned to the newly created Group E. The Parts table has been updated to include the mounting bracket and fasteners required for Virtual Technician installation. A new SRT has been added to Campaign Group E: 996-F175E ECU, VIRTUAL TECHNICIAN, POPULATION E, INSTALL (SF679), 0.8 hours. Additionally, the Work Instructions have been revised to provide supplementary details for installing the Virtual Technician on vehicles with Cummins engines that were missing the Common Powertrain Controller (CPC) mounting bracket. |
| SF679-Bulletin | 2024-11-06. Service campaign. UNKNOWN OR OTHER. Revised Field Service Campaign for Virtual Technician Module. 2nd REVISION:Certain vehicles in Group B with Cummins engines have been reassigned to the newly created Group E. The Parts table has been updated to include the mounting bracket and fasteners required for Virtual Technician installation. A new SRT has been added to Campaign Group E: 996-F175E ECU, VIRTUAL TECHNICIAN, POPULATION E, INSTALL (SF679), 0.8 hours. Additionally, the Work Instructions have been revised to provide supplementary details for installing the Virtual Technician on vehicles with Cummins engines that were missing the Common Powertrain Controller (CPC) mounting bracket. |
| ICI24-036 | 2024-11-06. Other. UNKNOWN OR OTHER. Important Campaign Information letter for SF679 – Revised Bulletin. |
| SF692-OWN LTR | 2024-10-04. Service campaign. UNKNOWN OR OTHER. Field Service Campaign for VIN Certification Labels |
| SF692-DLR LTR | 2024-10-04. Service campaign. UNKNOWN OR OTHER. Field Service Campaign for VIN Certification Labels |
| SF692-Bulletin | 2024-10-04. Service campaign. UNKNOWN OR OTHER. Field Service Campaign for VIN Certification Labels |
| CXA 8_24_Conmet Oil Pan | 2024-09-07. Other. ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Failures |
| CXA 8_24_AutoElevate Disa | 2024-09-07. Other. ENGINE. CX Advocate for AutoElevate Disablement Gen5 Engines |
| CXA 8_24_AutoElevate and | 2024-09-07. Other. ENGINE. CX Advocate for benefits of Autoelevate and hydrocarbon faults |
| CXA 7_24_Reman Process V2 | 2024-08-19. Other. ENGINE. CX Advocate for overview of the remanufacturing process. |
| CXA 7_24_Reman Process | 2024-08-02. Other. ENGINE. CX Advocate for overview of the remanufacturing process. |
| CXA 7_24_NOx | 2024-08-02. Other. ENGINE. CX Advocate for NOx conversion low faults. Update to CXA 6_24_NOx submission. |
| CXA 7_24_Conmet Oil Pan | 2024-08-02. Other. ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Failures |
| CXA 7_24_AutoElevate Disa | 2024-08-02. Other. ENGINE. CX Advocate for AutoElevate Disablement Gen5 Engines |
| CXA 06_24_Clutch Bolts | 2024-07-09. Other. POWER TRAIN. CX Advocate communication for clutch bolts |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.