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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.

By type

By component

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
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)
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
TSB-54-379-FTL2026-02-03. Service bulletin. SERVICE BRAKES. Revised Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
TSB-54-379-FTL2026-02-03. Service bulletin. SERVICE BRAKES. Technical Service Bulletin for ESC Warning Lamp and ECU Replacement
FleetCom_ABS Wheel Spd2026-01-08. Other. SERVICE BRAKES. Fleet Communications for ABS Wheel Speed Sensor Faults
CXA 10_25_Air Dryer Purge2025-11-06. Other. SERVICE BRAKES. CX Advocate for Experiencing Excessive Purging from Air Dryer
MYCOM_09122025-12025-10-03. Other. SERVICE BRAKES. My Communications for Parts Alert ABS Harness
SF622REV2022-03-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. Revised Field Service Campaign for Cascadia, 49X ABS MBSP+ Controller Software Update
ICI22-0152022-03-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. Important Campaign Information letter for SF622 – Addition of 8x4 Vehicles to Populationx
SF6132021-11-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. ConMet Front Hub to Rotor Fasteners. On certain vehicles, the front rotor nuts may not be torqued to manufacturer specification. Loose components could cause damage to the ABS tone rings, the ABS sensors, and the anchor plate mounting fasteners.
SF6222021-08-28. Service bulletin. SERVICE BRAKES, HYDRAULIC. Revised Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. REVISION: The work instructions have been revised. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
ICI21-0272021-08-28. Service bulletin. SERVICE BRAKES, HYDRAULIC. Important Campaign Information Letter for SF622 – Campaign Revision/Reactivation. This letter is to inform you that the work instructions for Field Service Campaign SF622, Cascadia/49X ABS MBSP+ Controller Software Update have been revised.
SF6222021-06-29. Service bulletin. SERVICE BRAKES, HYDRAULIC. Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
TechTalk5667762021-06-03. Service bulletin. SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM. Tech Talk Discussion 2021 P4 jyst brakes drag alarm on all the time
CALFTL42-0042021-05-26. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.
CALFTL54-0092021-05-25. Service bulletin. SERVICE BRAKES; SERVICE BRAKES, AIR. Customer Advisory Letter on New Cascadia ABS Fault Codes 520216/31 and 629/11
CALFTL54-0022021-05-25. Service bulletin. ELECTRICAL SYSTEM; PARKING BRAKE. Customer Advisory Letter on Enabling Horn Alarm with the Door Open and the Park Brake Set
CALFTL42-0032021-03-31. Service bulletin. SUSPENSION; SERVICE BRAKES. Customer Advisory Letter for Inspection and Correction of the Clearance between the Drive Axle Disc Brake Chamber and the Airliner Leaf Spring.
CALFTL54-010REV32021-03-26. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. Revised Customer Advisory Letter for ABS Warning Light Illumination with ABS code SA 11, SPN 629, FMI 11. REVISED: This CAL revises the CAL issued August 10th, 2020. Western Star 49X vehicles have been added to the CAL scope and instructions for downloading and installing software to address the ABS warning light illumination with ABS code SA 11, SPN 629, FMI 11 have replaced the corrective action of the previous CAL.
TechTalk81522021-03-03. Service bulletin. SERVICE BRAKES, AIR. Tech Talk discussion on New Cascadia Air Dryer Small Purges.
SF6082021-02-26. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES. Field Service Campaign for Cascadia Road Train Brake System - Export Only.
TechTalk74632021-02-04. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. Tech Talk continuing discussion on ABS trailer code 520216 31 P4 New Cascadia.
Techtalk79532020-12-31. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. Tech Talk discussion on 2021 p4 jyst brakes drag alarm on all the time.
Techtalk65782020-12-31. Service bulletin. SERVICE BRAKES, AIR. Tech Talk discussion on New Cascadia "low air pressure" warning light.
SB42-0792020-12-30. Service bulletin. SERVICE BRAKES. Freightliner Service Bulletin for Access to Front Brake Zerk Fittings. Certain vehicles with Detroit front axles and Meritor EX-L front air disc brakes do not have access to the front brake zerk fittings for lubrication.

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