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December 9, 2025 Other

Revised Service Solution for Western Star vehicles with excessive water intrusion into the air system

Western Star technical service bulletin SS 781-WST for 2021-2026 Western Star 47X, 2020-2026 Western Star 49X and 2024-2026 Western Star 57X.

Bulletin number
SS 781-WST
Component
Service brakes
Summary
Revised Service Solution for Western Star vehicles with excessive water intrusion into the air system

Owners of these vehicles have filed 2 complaints in the brakes category.

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