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Service bulletins for the 2021 Freightliner Cascadia

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

509 on file from NHTSA, as of 2026-10-19.

Warranty extensions
WI24-0192024-12-04. ENGINE. Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates

A warranty extension may pay for a repair after the basic warranty has ended. Read the document for which vehicles and which repair it covers.

By type

By component

Bulletins, newest first
TEM-11-000012026-08-03. Other. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; FORWARD COLLISION AVOIDANCE: WARNINGS. Truck Equipment Manufacturer upfit guide for Detroit Assurance Forward Radar Relocation and Adjustment
TSB-42-080-FTL2026-08-03. Service bulletin. POWER TRAIN. Revised Technical Service Bulletin for ABS Wheel Speed Fault Code Correction for MBSP Equipped Vehicles. Updated frequently asked questions.
CXA 06_26_Utility Lamp2026-07-06. Other. EXTERIOR LIGHTING. CX Advocate for Utility Lamp water intrusion
TSB-26-057-FTL2026-06-01. Service bulletin. POWER TRAIN. Revised Technical Service Bulletin for DT12 OVX Transmission Refresh
CXA 04_26_Side Guard2026-05-02. Other. LANE DEPARTURE: BLIND SPOT DETECTION. CX Advocate for P4 Side Guard Assist On/Off Menus and Trailer Functionality (TSB-54-381-FTL)
ICI26-0062026-05-02. Other. POWER TRAIN. Important Campaign Information for SF706 - Revised, Reactivated
SF706-DLR LTR2026-05-02. Service bulletin. POWER TRAIN. Revised Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
SF706-Bulletin2026-05-02. Service bulletin. POWER TRAIN. Revised Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
FleetCom 1_Solenoid2026-05-02. Other. ELECTRICAL SYSTEM. Fleet Communications for solenoid issues
CXA 03_26_ABS LA Fault2026-04-02. Other. SERVICE BRAKES. CX Advocate for 1810/02 ABS longitudinal acceleration fault (TSB-54-104-WST,TSB-54-379-FTL)
ICI26-0032026-04-02. Other. POWER TRAIN. Important Campaign Information letter for SF706 - campaign suspended
FleetCom_Frnt Susp Bush2026-03-05. Other. SUSPENSION. Fleet Communications for composite front suspension bushing
FleetCom_SF7062026-03-04. Other. POWER TRAIN. Fleet Communications for SF706 - Cascadia axle conversion
FleetCom_ESC Warning Lamp2026-03-04. Other. SERVICE BRAKES. Fleet Communications for TSB-54-379-FTL & TSB-54-104-WST ESC warning lamp and ECU replacement
SF706-OWN LTR2026-03-04. Service campaign. POWER TRAIN. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
SF706-DLR LTR2026-03-04. Service campaign. POWER TRAIN. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
MyCom_02062026-12026-03-04. Other. FUEL/PROPULSION SYSTEM. My Communications for update on UFU R61709 Fuel Filters
SF706-Bulletin2026-03-04. Service campaign. POWER TRAIN. Field Service campaign for Cascadia Axle Conversion: Adaptive Tandem (AT) 6x4 to New Final Drive (NFD)
TSB-26-055-FTL2026-02-03. Service bulletin. POWER TRAIN. Revised Technical Service Bulletin for DT12 Excessive Wear
TSB-54-379-FTL2026-02-03. Service bulletin. SERVICE BRAKES. Revised Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
CXA_01_26_Trans Support2026-02-03. Other. POWER TRAIN. CX Advocate for Aftermarket Transmission Support
TSB-54-379-FTL2026-02-03. Service bulletin. SERVICE BRAKES. Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
TSB-26-055-FTL2026-02-03. Service bulletin. POWER TRAIN. Technical Service Bulletin for DT12 Excessive Wear
TSB-26-052-FTL2026-02-03. Service bulletin. POWER TRAIN. Technical Service Bulletin for DT12 PTO Upfit
TSB-00-046-FTL2026-02-03. Service bulletin. UNKNOWN OR OTHER. Technical Service Bulletin for Cascadia Generations

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.