# Service bulletins for the 2022 Western Star 4700

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.

33 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
- [SS778\-WST](/bulletins/11013219.md), 2025-01-29, Other: STEERING. Service Solution for Power Steering Reservoir Fill Cap Venting
- [CXA 1\_16\_NOx](/bulletins/11013204.md), 2025-01-29, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 8\_24\_Conmet Oil Pan](/bulletins/11007517.md), 2024-09-07, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Failures
- [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 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
- [SF668](/bulletins/10237096.md), 2023-06-03, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. Field Service Campaign for ICU4Me Cluster Assembly Liquid Crystal Display.
- [SBW49\-020](/bulletins/10208391.md), 2022-03-03, Service bulletin: ENGINE AND ENGINE COOLING. Western Star Service Bulletin for DEF Connector Reinforcement Caps
- [CALWS91\-002](/bulletins/10208383.md), 2022-03-03, Service bulletin: SEAT BELTS. Customer Avisory Letter for Seat Bolt Inspection
- [MYCOM\_032521\-1](/bulletins/10200686.md), 2021-08-30, Service bulletin: UNKNOWN OR OTHER. Freightliner and Western Star Production Schedule Update Freightliner Cascadia \& Western Star 4700, 49X and 5700XE Production Schedule Update We recently communicated to our Freightliner Trucks dealer distribution network the rolling production delays for medium\-duty truck models built at our Mount Holly and Santiago Truck Manufacturing Plants\(TMP\). The effects of the COVID\-19 pandemic continue to impact global semiconductor supply chains and the prolonged duration of these shortages have reached our heavy\-duty truck supply chain as well.
- [PTP PAINT UPDT](/bulletins/10200574.md), 2021-08-27, Service bulletin: UNKNOWN OR OTHER. Portland Truck Plant Paint Update \- WST182 The Portland Truck Plant schedule is full through the end of 2021 for Western Star 4700, 4800, 4900, and 6900 models; the plant has also reached the maximum paint process capacity for multi\-color and custom paint designs. Due to the capacity constraint, the Western Star CAE team will no longer accept Truck Change Orders requesting changes from a single color paint to a multi\-color paint or custom paint design for vehicles building at the Portland Truck Plant through the end of 2021.
- [SF631](/bulletins/10199364.md), 2021-07-22, Service bulletin: ENGINE AND ENGINE COOLING. Field Service Campaign for Detroit Diesel Engine Fan Activation with A/C. On certain Freightliner and Western Star vehicles with Detroit Diesel engines, the engine fan fails to activate when the A/C pressure switch circuit is opened, resulting in poor A/C cooling performance at idle.

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