2021 Western Star 49X technical service bulletins
221 technical service bulletins and manufacturer communications cover the 2021 Western Star 49X, including one warranty extension.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair...
- CX Advocate for Twin Steer Equalizer Beam Bushing Wear
- CX Advocate for X-Series HD Front Suspension Threaded
- Revised Technical Service Bulletin for Removing Odometer Pause Wiring Modifications
- Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
- Revised Technical Service Bulletin for DT12 OVX Transmission Refresh
- Parts Bulletin for Bumper and Rock Guard Part Numbers
- Technical Service Bulletin for DT12 Excessive Wear
- CX Advocate for Aftermarket Transmission Support
- Fleet Communications for Intermittent Connections and ECU Fault Codes
- Fleet Communications for ECP (Electronic Control Pneumatic) Module Water Ingress
- 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 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 Low Coolant Sensor
- Technical Service Bulletin for Fixing Unintended Wiper Sweep
- Technical Service Bulletin for TufTrac M12 Bolts
- 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
- Technical Service Bulletin for Cummins X15 Power Steering Pump Plumbing
- My Communications for UFI 0-Ring Announcement
- Technical Service Bulletin for Removing Odometer Pause Wiring Modifications
- Parts Bulletin for Tie Rod Assembly Part Breakdown
- 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
- CX Advocate for NOx conversion low faults
- CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
- Service Solution for Western Star vehicles with excessive water intrusion into the air system
- CX Advocate for M2 Plus, 47X, 49X Fault Code 232/524000/19- ECU CPC data error
- 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
- Technical Service Bulletin for DT12 OVX Transmission Refresh
- Technical Service Bulletin for SAS01T to SAS03T Replacement Information
- Technical Service Bulletin for Repairing Seat Occupancy Sensor for ISRI, SEARS and National Truck Seats
- CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test...
- CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
- 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
- Service Solution for 47X/49X Front Suspension AluminumShackle Bars
- Important Campaign Information letter for SF698 – Third Revised Bulletin
- Revised Field Service Campaign for Western Star Heated Headlight Parameters
- Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
- 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
- Service Solution for 49X & 47X with Cummins Engines and eViscous Engine Fan with Communication Issues
- CX Advocate for WST x-series unintended wiper sweep (TSB82-003-WST)
- Service Solution for X Series Odometer Reading Incorrect With Split Shaft PTO's
- CX Advocate for HDEP High Pressure Fuel Line Seal Failures
- Important Campaign Information letter for DDC D23M3
- 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 ConMet Oil Pan Insert Additional Failures
- Revised Technical Service Bulletin for New Battery Cable Access (BCA) Parts for Improved Cold Weather...
- 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 CTP2 Shortage Recovery – Cummins Only (SF685)
- CX Advocate for NOx conversion low faults
- 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 clutch bolts
- Revised Field Service Campaign for Western Star Heated Headlight Parameters
- Revised Important Campaign Information letter for SF698
- Revised Technical Service Bulletin for Off-Road/Low Traction Throttle Parameter Update
- Field Service Campaign for Western Star Heated Headlight Parameters
- Field Service Campaign Owner Reminder Postcard small population
- Field Service Campaign Owner Reminder Postcard large population
- Customer letter regarding variable speed water pump.
- Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
- Field Service Campaign for Common Telematics Platform (CTP) Installation and Initialization
- Technical Service Bulletin for Off-Road/Low Traction Throttle Parameter Update
- Revised Emissions Recall: Cummins DEF Sensor Shortage
- Important Campaign Information letter for FL974
- Important Campaign Information letter for SF669 Campaign Suspended
- Service Solution for X Series Odometer Reading Incorrect With Split Shaft PTOs
- Emissions Recall: Cummins DEF Sensor Shortage
- Field Service Campaign for Adaptive Cruise Control
- Service Solution for 47X & 49X Headlamp Marker Light Strobing or Flickering
- Revised Field Service Campaign for Common Telematics Platform Software Update
- Service Bulletin for Relocating the Bluetooth Microphone
- Service Solution for 49X and 47X Web Mounted 5th Wheel Ramps
- Revised Service Bulletin for HVAC Software Updates
- Field Service Campaign for Western Star 49X Airliner Rear Suspension
- Field Service Campaign for Common Telematics Platform Software Update
- Field Service Cmpaign for Western Star 49X Radiator RockGuard & Fan Shroud.
- Western Star Service Bulletin for Resetting the Maintenance System for DT12 Oil Changes
- Field Service Campaign for Western Star Front Radar Mounting Bracket
- Updated Western Star Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion
- My Communications for SF625 and SF657 Pre-Flashed USB Tools
- Field Service Campaign for Western Star 47X and 49X Maintenance System Update
- Western Star Service Bulletin for Non-Functioning Heated Headlamps
- Western Star Service Bulletin for ABS mBSP ECU Software Update Fault Code 629-11. New Cascadia vehicles...
- Important Campaign Information Letter for SF657 â Revised Bulletin
- Revised Freightliner and Western Star CTP Software Update REVISION: New tools are required
- Western Star Service Bulletin for Resetting the Maintenance System for DT12 Oil Changes
- Western Star Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion
- Western Star Service Bulletin for Meritor Rear Axle Temperature Parameters
- Service Solution for Primary Mirror Shaking and Vibration
- Field Service Campaign for Western Star 47X and 49X Front Closing Crossmember
- Field Service Campaign for Freightliner and Western Star CTP Software Update
- Western Star Service Bulletin for HVAC Software Updates
- Service Solution for 49X & 47X Non FunctioningHeated Headlamps
- Western Star Field Service Campaign for Western Star 49X VRDU Programming
- Western Star Field Service Campaign for Western Star 49X SRR Overwrite Sensor Mounting Data Update
- Service Solution for Power Steering Cap Contact withHood Strap
- Important Campaign Information Letter for DDC D21M1 Termination Date Extended
- Important Campaign Information Letter for DDC D21M7 Termination Date Extended
- Field Service Campaign for Western Star 47X and 49X SBA Front Suspension Shackle Bolts
- Field Service Campaign for Western Star 49X Front Crossmember
- Service Solution for 49X Hood Handle Mounting
- Important Campaign Information letter for SF622 â Addition of 8x4 Vehicles to Populationx
- Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
- Important Campaign Information Letter for SF635 â Work Instructions Revised.
- Revised Western Star Field Service Campaign for Western Star 49X
- Customer Advisory Letter for Western Star 49X Adaptive Cruise Control
- Western Star Service Bulletin for Battery Load Disconnect Switch Installation
- Transmission Cooler Line Plumbing Fitting
- ABA off Switch Instructions
- Service Solution for Mirror Mounted Antenna Ground
- Service Solution for Aero Height Control Interfering with RDF Alignment
- Revised Detroit Technical Service Letter for Gen 5 Detroit DD16 Poor Acceleration Complaints In Western...
- Detroit Field Service Campaign for GHG21 Detroit DD16® CPC Software Reprogramming
- Field Service Campaign for Western Star 49X Transmission Cooler Plumbing
- ECP (Electronic Controlled Pneumatics) Ground Noise/False Codes
- Beacon Light Wiring Harness
- SF626 Western Star Window Replacement Inspection Notification
- XMC Software Update
- Revised Technical Service Letter for GHG21 Detroit DD16 Poor Acceleration Complaints In Western Star 49X...
- Service Solution for XMC Output Reliability
- My Communication for Detroit Connect Over the Air Issue Update
- DetroitConnect follow-up customer communication for certain vehicles unable to complete over the air...
- Field Service Campaign for Western Star 49X Differential Lock
- Service Solution for Aux E-vault Rattle in Day Cab. Rattle noise inside of cab coming from the e-vault...
- Service Solution for Door Drain Plug & Water Pooling.
- Important Campaign Information Letter for SF622 â Campaign Revision/Reactivation
- Revised Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update
- Technical Service Letter for GHG21 Detroit DD16 Poor Acceleration Complaints In Western Star 49X Chassis...
- Service Solution for Transmission Cooler Line Plumbing Fitting
- Service Solution for Exterior Sun Visor Loose
- Service Solution for Cummins PTO functionality error software level 81Z-006
- Western Star Tough Talk episode 3 now available.
- Western Star Service Bulletin for Replacing 104-Way Terminal Wiring Using a Pigtail Kit.
- Service Solution for Aero Height Control Interfering with RDF Alignment and 42/523004/13 and 232/524042/9...
- Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update
- Service Solution for fuel level sending unit loose.
- Western Star Service Bulletin for Key Fob ID Retention
- Western Star Service Solution for hood fender marker lamp
- Revised Western Star Service Solution for XMC Output Reliability regarding the six 20 Amp outputs...
- Western Star Service Solution for XMC Output Reliability regarding the six 20 Amp outputs (001-006) on the...
- Tech Talk Discussion PTO Parameter DT12 Transmission 49X 2021 WU7373
- Western Star Service Solution for Wheel Cut and Fender Interference
- Tech Talk discussion on enable to send my chec feature in my 49x truck.
- Service Solution for 49X Vertical Exhaust Loose.
- Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown
- Detroit Field Service Campaign for DT12 Transmission Drive Shaft Cover Plug Reseal
- Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown
- DetroitConnect customer communication for certain vehicles unable to complete over the air updates...
- Revised Customer Advisory Letter for ABS Warning Light Illumination with ABS code SA 11, SPN 629, FMI 11....
- Detroit Field Service Campaign for DT12 Gear Grind During Downshift Software Update.
- Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats
- DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to...
- Western Star Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
- Tech Talk discussion on Circuit Load tester.
- Revised Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14....
- Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available
- Technical Service Letter for Gen 5 DD15 Instrument Panel Oil Pressure Gauge Operation
- Warranty Information Letter for Body Builder/Truck Equipment Manufacturer Demonstration Program.
- Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes
- Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to...
- Tech Talk continued discussion on code spn 523525 fmi 14.
- Revised Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance
- Customer Advisory Letter for Western Star 49X Seat Mismatch
- Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters
- Warranty Information Letter for Detroit Bearing Failures
- Technical Service Letter for Detroit Bearing Failures
- Western Star Service Bulletin for Access to Front Brake Zerk Fittings
- Western Star Service Bulletin for Axle Flange Gasket Replaced with O-Ring
- Western Star Customer Advisory Letter for WST 49X Video Capture Decision Unit Fuse.
- Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
- Western Star Service Bulletin for Powernet Troubleshooting Guide
- Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
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