2025 Western Star 49X technical service bulletins
214 technical service bulletins and manufacturer communications cover the 2025 Western Star 49X, including 3 warranty extensions.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Standard Warranty Extension for vehicles with TitanX Radiators
- Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair...
- Warranty Policy Letter for Steering Wheel Centering Policy Amendment
- Customer Advisory Letter for Torque Converter Parameter Mismatch
- CX Advocate for Cummins Axiomatic fan Control Module Fails Due to Internal Short
- CX Advocate for J1939 Codes with Cummins Engine (TSB-54-102-WST)
- CX Advocate for Surge Tank Level Sensor Float Sinking
- Technical Service Bulletin for Door Sill Plate Bracket Repair
- Technical Service Bulletin for Wiper Supplier Change
- Technical Service Bulletin for J1939 Communication Errors with Cummins Engine Automated or Allison...
- Technical Service Bulletin for HVAC Stops Cooling
- Detroit Transmissions Manual Update for Symptom Diagnostics — DT12 C/D Box Range Shift to Neutral with...
- CX Advocate for Twin Steer Equalizer Beam Bushing Wear
- CX Advocate for X-Series HD Front Suspension Threaded
- Revised Warranty Information letter for missing chamber caging bolts
- Truck Equipment Manufacturer Solution for PTO Mode Delay for Driving PTO
- CX Advocate for Lost/Damaged Replacement F1011/F1015 Labels
- Revised Technical Service Bulletin for Removing Odometer Pause Wiring Modifications
- Warranty Information letter for missing chamber caging bolts
- CX Advocate for Hood Cracks
- Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
- Revised Technical Service Bulletin for DT12 OVX Transmission Refresh
- Warranty Information letter for Reman Parts Usage Policy Reminder
- Truck Equipment Manufacturer Solution for RSS with PTO Engagement
- Revised Technical Service Bulletin for DT12 Range Detent Diagnostic
- My Communications for ConMet Quality Alert -- ABP 10045888 -- Seal Service Kit
- Parts Bulletin for Bumper and Rock Guard Part Numbers
- Fleet Communications for Trucks arriving at dealers and body builders with chassis leans greater than 3/8...
- CX Advocate for 1810/02 ABS longitudinal acceleration fault (TSB-54-104-WST,TSB-54-379-FTL)
- CX Advocate for error generates when SSR is moved into an engine brake position 1,2,3 (TSB-26-058-FTL,...
- CX Advocate for discolored coolant surge tanks (24CSA-20)
- Technical Service Bulletin for ESC warning lamp and ECU replacement
- Technical Service Bulletin for DT12 Excessive Wear
- CX Advocate for Aftermarket Transmission Support
- Technical Service Bulletin for Transmission shift stalk
- Fleet Communications for Intermittent Connections and ECU Fault Codes
- Fleet Communications for TCM Fault 520970/7 – Clutch Unable to Open Fully
- Fleet Communications for ECP (Electronic Control Pneumatic) Module Water Ingress
- Fleet Communications for Corrosion Protecton/Glyptal Application
- Fleet Communications for Heater Core Plugging
- Revised Service Solution for Western Star vehicles with excessive water intrusion into the air system
- Technical Service Bulletin Low Coolant Sensor
- CX Advocate for New AMTcc
- CX Advocate for ECP (Electronic Control Pneumatic) Modules, possible water ingress
- CX Advocate for Intermittent Connections and ECU Fault Codes
- CX Advocate for Questions/Issues Raised
- Fleet Communications for New AMTcc
- Fleet Communications for Low Coolant Sensor
- Revised Emissions Recall for VECI Label Emissions Recall
- Important Campaign Information for F1011 & F1015 Campaigns Revised
- Service Solution for M2 Plus, 108,114SD Plus and New Cascadia Vehicles, SSL and SSR Non-Functional
- Service Solution for X-Series Western Star Vehicles, SSL and SSR Non-Functional
- Technical Service Bulletin for TufTrac M12 Bolts
- CX Advocate for Trucks arriving at dealers and body builders with chassis leans greater than 3/8 of an inch
- CX Advocate for ConMet Oil Pan Insert Additional Issues
- CX Advocate for Cummins X15 Power Steering Pump Plumbing
- CX advocate for WST X-Series J1939 Communication Errors with Cummins Engines
- CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
- CX Advocate for Removing Odometer Pause Wiring Modifications (TSB-54-375-FTL, TSB-54-100-WST)
- CX Advocate for technical questions/issues raised
- CX Advocate for Plastic Opaque Surge Tank Staining
- Technical Service Bulletin for Cummins X15 Power Steering Pump Plumbing
- Important Campaign Information letter for (Revised) Love’s Travel Stops Authorized Campaign Program
- CX Advocate for SF715 Stalk Switch Left and Right Inoperative
- Warranty Information letter for Power Steering Tank Venting Diagnostic Procedures Revision
- My communications for DTNA Announces Extended Coverage Policy Updates
- My Communications for UFI 0-Ring Announcement
- Technical Service Bulletin for DT12 Range Detent Diagnostic
- Field Service campaign for stalk switches
- Important Campaign Information letter for F1015 Campaign Revised
- CX Advocate for DT12
- Technical Service Bulletin for Removing Odometer Pause Wiring Modifications
- Emissions Recall for VECI Label Emissions Recall
- Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
- Revised Important Campaign Information letter for (Revised) CPWA Recall Program
- CX Advocate for DEF Regen Inhibit Dash Switch Indicator (SF716)
- CX Advocate for Nuisance Mirror Adjustment DTC (SS785-WST)
- CX Advocate for Transmission Cooler Line Rub with Recirc Baffle (SF718)
- Technical Service Bulletin for Hood Headlight Wiring Too Short
- Service Solution for Nuisance Mirror Adjustment DTC
- Parts Bulletin for Tie Rod Assembly Part Breakdown
- Field Service Campaign for Transmission Oil Cooler Line Clearance
- Field Service Campaign for DEF Regen Inhibit Dash Switch Indicator
- CX Advocate for Headlight wiring (TSB54-099-WST)
- Service Solution for ECP Solenoid Valve Interim Replacement Parts
- Service Solution for DT12 Oil Plug Ports
- Features and Benefits for Detroit Connect Base Service Renewal
- Features and Benefits for Detroit Connect UpfrontService Extension
- Service Solution for ICC5 Erroneous Electric Power Steering Warning Message
- My Communications for Detroit Assurance – Adaptive Cruise Control for Cummins Update
- Emission recall for Western Star DEF Header
- CX Advocate for NOx conversion low faults
- CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
- CX Advocate for wheel seals
- Service Solution for ICC5 B-Panel Gauges Intermittently Not Being Displayed
- Service Solution for Western Star vehicles with excessive water intrusion into the air system
- Service Solution for Tire Pressure Monitoring System (TPMS) Water Intrusion Through Perimeter Seal
- CX Advocate for DT12 Delayed Acceleration TCM Parameter Issue
- CX Advocate for M2 Plus, 47X, 49X Fault Code 232/524000/19- ECU CPC data error
- CX Advocate for Cummins Engine with Wired Regen Inhibit Switch (SF703)
- CX Advocate for turbo oil drain cracking
- Revised Service Solution for X-Series Western Star Fault Code 232/524000/19- ECU CPC data error
- Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts
- Service Solution for 47X/49X Dual Power Steering Gear Orifice Fittings
- Service Solution for X-Series With DT12 Transmission Sluggish Throttle Response or Delayed Shift
- Technical Service Bulletin for Gen 5 DD13 Turbocharger Oil Return Line Cracks
- Technical Service Bulletin for DT12 OVX Transmission Refresh
- Technical Service Bulletin for SAS01T to SAS03T Replacement Information
- Detroit Field Service campaign for 2024 HDEP ACM Software Reprogramming.
- Technical Service Bulletin for Repairing Seat Occupancy Sensor for ISRI, SEARS and National Truck Seats
- Revised Field Service Campaign for Espar Fuel Standpipe Weld
- CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test...
- CX Advocate for Cummins X15 Fuel Pump Cracks (F1010)
- CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
- CX Advocate for Espar Fuel Standpipe Weld (SF705)
- CX Advocate for GATS2.4 being expanding to DD15
- CX Advocate for unwanted park brake warning (TSB-54-098-WST)
- Service Solution for X-Series intermittent no-start and CPC not configured message
- Service Solution for Power Steering Reservoir Fill Cap Venting
- Field Service Campaign for Espar Fuel Standpipe Weld
- Service Solution for 47X/49X Front Suspension AluminumShackle Bars
- Updated Detroit Ferightliner Action Bulletin for Detroit Connect Safety Plus
- CX Advocate for discolored coolant surge tank
- CX Advocate for HDEP Running Change
- Service Solution for 47X, 49X, 57X Park brake check valve may be improperly plumbed causing brakes to drag
- Service Solution for X-series Bodybuilder Marker Lights Turn Off While Truck Lights Remain On
- Technical Service Bulletin for Disabling the ‘Park Brake Set / Door Open’ Warning
- Detroit Freightliner Action Bulletin for Detroit Connect Safety Plus
- Field Service Campaign for Cummins Engine with Wired Regen Inhibit Switch
- CX Advocate for the following CSA: (24CSA-17,24CSA-19,24CSA-20) Gen 5 DD13 Turbocharger Oil Return Line...
- CX Advocate for WST Trucks built with wrong exhaust elbow (SF702)
- Customer Service Annoucement for Heavy-Duty Engine Product (HDEP) Oil Separator Leaks
- Customer Service Annoucement for Discolored Coolant Surge Tank on Heavy Duty Engine Product (HDEP)
- My Communications for OnGuard Discontinuation on all Daimler Truck products
- Service Solution for 47X & 49X Shifter Interference with Arm Rest
- Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
- Field Service Campaign for Chrome Exhaust Elbows
- Detroit Customer Service Annoucement for Gen 5 DD13 Turbocharger Oil Return Line Cracks
- CX Advocate for HDEP High Pressure Fuel Line Seal Failures
- Detroit Customer Service Annoucement for Gen 5 DD15 Cylinder Head Cup Plug Replacement
- Detroit Emissions Recall Campaign for DD13 CARB 24 ACM Software Reprogramming
- CX Advocate for benefits of Autoelevate and hydrocarbon faults
- CX Advocate for AutoElevate Disablement Gen5 Engines
- CX Advocate for Technical Service Bulletin for New Battery Cable Access (BCA) Parts for Improved Cold...
- CX Advocate for Wabco Onguard (TSB54-364-FTL, TSB54-094-WST)
- Revised Technical Service Bulletin for New Battery Cable Access (BCA) Parts for Improved Cold Weather...
- Draft Fuel Injection Cleaning Machine (FICM) Setup Instructions
- Fuel Injection Cleaning Machine Priming Procedures
- Cleaning Gen5 Engine Fuel Injectors
- Fuel Injector Cleaner Updated Procedure
- Technical Service Bulletin for Wabco OnGuard Display Discrepancy
- Technical Service Bulletin for New Battery Cable Access (BCA) Parts for Improved Cold Weather Functionality
- Important Campaign Information Letter for SF698 – Second Revised Bulletin
- Revised Field Service Campaign for Western Star Heated Headlight Parameters
- Service Solution for ECP Solenoid Interim Service Replacement Parts
- CX Advocate for NOx conversion low faults
- My Communications for DTNA Tire Communication Update
- Customer Advisory Letter for Battery Cable Depopulation Stud Inspection, with or without Jumpstart Post
- CX Advocate communication for NOx conversion low faults
- CX Advocate communication for oil lines disconnecting
- CX Advocate communication for clutch bolts
- Revised Field Service Campaign for Western Star Heated Headlight Parameters
- My Communications for ICUC Programming Update
- Revised Important Campaign Information letter for SF698
- My Communications for Diagnosticlink ICUC Programming Error
- Technical Service Bulletin for New Final Drive Over Heat Diagnostic
- Field Service Campaign for Western Star Heated Headlight Parameters
- Customer letter regarding variable speed water pump.
- Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
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