2022 Western Star 4700 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Jun 1, 2026 Service bulletinParts Bulletin for Fluorosilicone Fuel Tank Cap Seals
• Oct 16, 2025 OtherCX Advocate for ConMet Oil Pan Insert Additional Issues
• Mar 20, 2025 OtherCX Advocate for NOx conversion low faults
• Jan 14, 2025 OtherService Solution for Power Steering Reservoir Fill Cap Venting
• Aug 15, 2024 OtherCX Advocate for ConMet Oil Pan Insert Additional Failures
• Jul 18, 2024 OtherCX Advocate for NOx conversion low faults
• Jun 21, 2024 OtherCX Advocate communication for NOx conversion low faults
• Jun 21, 2024 OtherCX Advocate communication for clutch bolts
• May 29, 2024 Service bulletinTechnical Service Bulletin for New Final Drive Over Heat Diagnostic
• May 24, 2024 OtherService Solution for Thread Spring Pin Suspension Alignment & Installation
• May 21, 2024 OtherCustomer letter regarding variable speed water pump.
• May 8, 2024 OtherService Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
• Feb 20, 2024 Service bulletinRevised Emissions Recall: Cummins DEF Sensor Shortage
• Feb 20, 2024 Service bulletinImportant Campaign Information letter for FL974
• Jan 19, 2024 Service bulletinEmissions Recall: Cummins DEF Sensor Shortage
• May 11, 2023 Service bulletinField Service Campaign for ICU4Me Cluster Assembly Liquid Crystal Display.
• Feb 15, 2022 Service bulletinWestern Star Service Bulletin for DEF Connector Reinforcement Caps
• Feb 2, 2022 Service bulletinCustomer Avisory Letter for Seat Bolt Inspection
• Aug 19, 2021 Service bulletinPortland Truck Plant Paint Update
• Jul 1, 2021 Service bulletinField Service Campaign for Detroit Diesel Engine Fan Activation with A/C. On certain Freightliner and...
• Jun 10, 2021 Service bulletinWestern Star Service Bulletin for Key Fob ID Retention
• May 18, 2021 Service bulletinSupply chain shortage notice
• Apr 29, 2021 Service bulletinService Solution for DT12 Harness Chaffing
• Apr 19, 2021 Service bulletinWarranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown
• Apr 6, 2021 Service bulletinWarranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown
• Mar 25, 2021 Service bulletinFreightliner and Western Star Production Schedule Update Freightliner Cascadia & Western Star 4700, 49X...
• May 12, 2017 Service bulletinService Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
• Dec 1, 2016 Service bulletinPaint Peeling, Hood.
• May 19, 2015 Service bulletinWestern Star 4700 non removable bug screen with additional coverage to the bumper