# Service bulletins for the 2022 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.

36 bulletins from NHTSA, as of 2026-10-19.

- [PB\-47\-900\-WST](/bulletins/11034507.md), 2026-07-06, Service bulletin: FUEL/PROPULSION SYSTEM. Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
- [CXA\_10\_25\_Conmet Oil Pan](/bulletins/11024958.md), 2025-11-05, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Issues
- [CXA 3\_25\_NOx](/bulletins/11016309.md), 2025-04-02, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 2\_25\_NOx](/bulletins/11014818.md), 2025-03-04, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 1\_16\_NOx](/bulletins/11013204.md), 2025-01-29, Other: ENGINE. CX Advocate for NOx conversion low faults
- [D24R2\-OWN LTR](/bulletins/11012368.md), 2025-01-06, Emissions: ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
- [D24R2\-DLR LTR](/bulletins/11012367.md), 2025-01-06, Emissions: ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
- [D24R2\-Bulletin](/bulletins/11012366.md), 2025-01-06, Emissions: ENGINE. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
- [CXA 8\_24\_Conmet Oil Pan](/bulletins/11007517.md), 2024-09-07, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Failures
- [CXA 8\_24\_AutoElevate Disa](/bulletins/11007513.md), 2024-09-07, Other: ENGINE. CX Advocate for AutoElevate Disablement Gen5 Engines
- [CXA 8\_24\_AutoElevate and](/bulletins/11007512.md), 2024-09-07, Other: ENGINE. CX Advocate for benefits of Autoelevate and hydrocarbon faults
- [CXA 7\_24\_NOx](/bulletins/11005500.md), 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](/bulletins/11005494.md), 2024-08-02, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Failures
- [CXA 7\_24\_AutoElevate Disa](/bulletins/11005493.md), 2024-08-02, Other: ENGINE. CX Advocate for AutoElevate Disablement Gen5 Engines
- [CXA 06\_24\_Clutch Bolts](/bulletins/11003924.md), 2024-07-09, Other: POWER TRAIN. CX Advocate communication for clutch bolts
- [CXA 06\_24\_NOx](/bulletins/11003889.md), 2024-07-09, Other: ENGINE. CX Advocate communication for NOx conversion low faults
- [VSWP Customer Letter](/bulletins/11001976.md), 2024-06-22, Other: ENGINE. Customer letter regarding variable speed water pump.
- [SS734\-WST](/bulletins/11000986.md), 2024-06-05, Other: SUSPENSION. Service Solution for Thread Spring Pin Suspension Alignment \& Installation
- [SS763\-WST](/bulletins/11000984.md), 2024-06-05, Other: ENGINE. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
- [TSB35\-023\-WST](/bulletins/11000978.md), 2024-06-05, Service bulletin: POWER TRAIN. Technical Service Bulletin for New Final Drive Over Heat Diagnostic
- [SS3144\-FTL](/bulletins/10253879.md), 2024-05-07, Service bulletin: ENGINE AND ENGINE COOLING. Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
- [ICI24\-006](/bulletins/10251202.md), 2024-03-06, Service bulletin: ENGINE AND ENGINE COOLING. Important Campaign Information letter for FL974 \- Revised Bulletin \& Population
- [FL974](/bulletins/10251200.md), 2024-03-06, Service bulletin: ENGINE AND ENGINE COOLING. Revised Emissions Recall: Cummins DEF Sensor Shortage. REVISION: Some vehicles formerly in Group F have been moved to Group G and have been assigned a new part number as specified in Table 1. An SRT for 'Calibration Code Only: Update or Confirm' has been added, as shown in Table 2, to be used when a new DEF header is not required. There have been some other minor changes to the work instructions and SRT times.
- [FL974](/bulletins/10249516.md), 2024-02-06, Service bulletin: ENGINE AND ENGINE COOLING. Emissions Recall: Cummins DEF Sensor Shortage
- [ICI22\-017](/bulletins/10210548.md), 2022-05-03, Service bulletin: POWER TRAIN. Important Campaign Information Letter for DDC D21M1 Termination Date Extended. This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an additional three months. Please use the extended termination date for all work under D21M1 from this point forward. REVISION: D21M1 termination date extended to July 1, 2022.

More: [the next page](/v1/vehicles/2022_western-star_4900/bulletins?cursor=2022-05-03_10210548) (JSON)

JSON: [/v1/vehicles/2022_western-star_4900/bulletins](/v1/vehicles/2022_western-star_4900/bulletins)

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