2021 Freightliner Cascadia Technical Service Bulletins

509 technical service bulletins (TSBs) are on record for the 2021 Freightliner Cascadia. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11023665Sep 12, 2025Brakes. My Communications for Parts Alert ABS Harness
• 11023657Sep 5, 2025Fuel system. Revised Parts Bulletin for Cascadia 23-inch Diameter Fuel Tanks
• 11023660Sep 2, 2025Fuel system. My Communications for UFI 0-Ring Announcement
• 11022341Aug 21, 2025Transmission and drivetrain, Other or unknown, Engine. CX Advocate for technical questions/issues raised
• 11022333Aug 21, 2025Fuel system. My Communications for UPDATE TO DTNA PARTS QUALITY ALERT STOCK HOLD on UFU R61709
• 11022332Aug 18, 2025Fuel system. My Communications for Parts Hold on UFU Filter
• 11021242Jul 28, 2025Wheels. Revised Technical Service Bulletin for Hub Oil Level in Final Drive (NFD) Top Performance Axles on Decked Vehicles
• 11020273Jun 11, 2025Steering. Parts Bulletin for Tie Rod Assembly Part Breakdown
• 11017555Apr 30, 2025Transmission and drivetrain. Service Solution for DT12 Oil Plug Ports
• 11017537Apr 23, 2025Electrical system. Service Solution for ICC5 Erroneous Electric Power Steering Warning Message
• 11017549Apr 18, 2025Other or unknown. Features and Benefits for Detroit Connect UpfrontService Extension
• 11017548Apr 18, 2025Other or unknown. Features and Benefits for Detroit Connect Base Service Renewal
• 11017529Apr 17, 2025Electrical system. CX Advocate for ICC5 erroneous electric power steering warning message (SS3176-FTL)
• 11016335Mar 31, 2025Electrical system. Service Solution for ICC5 Erroneous Electric Power Steering Warning Message
• 11016328Mar 26, 2025Other or unknown. Technical Service Bulletin for Load Dump Switch Inspection and Installation on Dometic Refrigerators
• 11016310Mar 20, 2025Steering. CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
• 11016309Mar 20, 2025Engine. CX Advocate for NOx conversion low faults
• 11016315Mar 12, 2025Electrical system. Service Solution for ICC5 B-Panel Gauges Intermittently Not Being Displayed
• 11014819Feb 20, 2025Engine. CX Advocate for turbo oil drain cracking
• 11014818Feb 20, 2025Engine. CX Advocate for NOx conversion low faults
• 11014786Feb 10, 2025Engine. My Communications for Variable Speed Coolant Pump for DD13 Engines - Cascadia/57X Only
• 11014775Feb 5, 2025Engine. Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts
• 11014785Feb 4, 2025Steering. Technical Service Bulletin for SAS01T to SAS03T Replacement Information
• 11014781Feb 4, 2025Transmission and drivetrain. DT12 OVX Transmission Refresh
• 11014780Feb 4, 2025Transmission and drivetrain. Technical Service Bulletin for DT12 Excessive Wear
• 11013206Jan 16, 2025Engine. CX Advocate for turbo oil drain cracking
• 11013205Jan 16, 2025Seats. CX Advocate for repairing seat occupancy sensor (TSB 91-016-FTL)
• 11013204Jan 16, 2025Engine. CX Advocate for NOx conversion low faults
• 11013201Jan 16, 2025Engine. CX Advocate for GATS2.4 being expanding to DD15
• 11013199Jan 16, 2025Engine. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
• 11013196Jan 16, 2025Engine. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check.
• 11013215Jan 15, 2025Electrical system. Service Solution for Cascadia intermittent no-start and CPC not configured message
• 11013216Jan 14, 2025Steering. Service Solution for Power Steering Reservoir Fill Cap Venting
• 11012310Dec 23, 2024Transmission and drivetrain, Lane departure, Engine. Technical Service Bulletin for J1939 Communication Errors with Cummins Engine Automated or Allison Transmission and Bendix Side Radar
• 11012312Dec 7, 2024Transmission and drivetrain. Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management
• 11012311Dec 6, 2024Transmission and drivetrain. Technical Service Bulletin for Detroit Drive Axle Identification and Lubrication
• 11012394Dec 4, 2024Electrical system. FAB 337 for 4th and Fifth Gen Cascadia RP1226 - Progressive Low Voltage Disconnect (PLVD)
• 11012368Dec 3, 2024Engine. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
• 11012367Dec 3, 2024Engine. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
• 11012366Dec 3, 2024Engine. Emission Recall for DETROIT DD13 and DD16 ACM Software Reprogramming
• 11011124Nov 26, 2024Transmission and drivetrain. Technical Service Bulletin for Detroit Drive Axle Identification and Lubrication
• 11011098Nov 21, 2024Engine, Transmission and drivetrain, Lane departure. CX Advocate for P4 J1939 Communication Errors (TSB54-366-FTL)
• 11011082Nov 21, 2024Engine. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check.
• 11011072Nov 21, 2024Transmission and drivetrain. Revised Technical Service Bulletin for ABS Wheel Speed Fault Code Correction for MBSP Equipped Vehicles. Description of Revisions: This bulletin replaces the version dated 10/09/2024. Updated FMI number in the metadata.
• 11011107Nov 20, 2024Engine, Visibility (wipers, defrost, mirrors), Lane departure. Service Solution for J1939 CAN issues for vehicles equipped w/ Bendix Side Radar w/ expanded field of view
• 11011075Nov 20, 2024Seats. Technical Service Bulletin for Repairing Seat Occupancy Sensor for ISRI, SEARS and National Truck Seats
• 11011588Nov 19, 2024Transmission and drivetrain. Revised Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management.
• 11011076Nov 11, 2024Engine. Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates
• 11010182Oct 29, 2024Engine. Service Solution for Cascadia with Cummins Engines and eViscous Engine Fan with Communication Issues
• 11010169Oct 28, 2024Engine, Transmission and drivetrain, Lane departure. Technical Service Bulletin for J1939 Communication Errors with Cummins Engine Automated or Allison Transmission and Bendix Side Radar

← All problems reported for the 2021 Freightliner Cascadia