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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: Equipment and accessories are shown. Show all

Bulletins, newest first
SF6732024-04-02. Service bulletin. EQUIPMENT. Field Service Campaign for Common Telematics Platform (CTP) Installation and Initialization
SF672_V42023-12-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Revised Field Service Campaign for Common Telematics Platform Software Update
SB60-1782023-11-03. Service bulletin. EQUIPMENT. Service Bulletin for Relocating the Bluetooth Microphone
SF6722023-06-29. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Field Service Campaign for Common Telematics Platform Software Update
SF662_V22023-05-05. Service bulletin. EQUIPMENT. Revised Freightliner Field Service Campaign for TomTom Android Black Box Update
ICI23-0142023-05-05. Service bulletin. EQUIPMENT. Important Campaign Information Letter for SF662 TomTom Work Instructions - Correction to Fuse Number.
SF6622023-04-07. Service bulletin. EQUIPMENT. Field Service Campaign for TomTom Android Black Box Update
MYCOM_110120222022-12-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. My Communications for SF625 and SF657 Pre-Flashed USB Tools. The download files for SF625 and SF657 are no longer available in our download center. In order to perform these updates you will need to order the Pre-Flashed USB tools from the PDC. This will allow for a more efficient and timely service.
SF6572022-10-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Revised Freightliner and Western Star CTP Software Update REVISION: New tools are required. The USB stick with SF657 software already loaded, along with the USB stick to CTP adaptor harness that is On-the-Go (OTG) protocol compliant, now have part numbers that can be purchased through the parts distribution center (PDC).
ICI22-0442022-10-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Important Campaign Information Letter for SF657 – Revised Bulletin. Newest Revision: A screenshot of the DiagnosticLink screen showing in Fig.15 showing 'Activation OK' must be kept on file with the repair order. This letter is to inform you that tools are now required for the SF657 repair, and the work instructions have been updated.
SS3108-FTL20222022-09-01. Service bulletin. EQUIPMENT. Service Solution for MS01T Maintenance System FaultCode Diagnosis
SS3107-FTL20222022-09-01. Service bulletin. EQUIPMENT. Service Solution for New Cascadia Replacing Common Telematics Platform (CTP) 1 With a CTP2
SF6572022-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Field Service Campaign for Freightliner and Western Star CTP Software Update
SF611REV22022-06-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Revised Field Service Campaign for Cascadia CTP Reset. Certain vehicles equipped with DTNAs proprietary Common Telematics Platform (CTP) are not communicating; therefore they are unable to benefit from over-the-air software updates. The CTP will be reset and some will also be initialized.
FP54-0892022-03-03. Service bulletin. EQUIPMENT. Freightliner Parts Technical Bulletin for Discontinued Radio Replacement.
SF6152021-11-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Stoneridge ICUC Replacement. Certain vehicles equipped with a Stoneridge instrument control unit common (ICUC) were programmed using a new method to improve efficiency and align with programming for European ICUCs. All ICUCs built using the new method are permanently in the "read only" mode, and any attempt to flash will corrupt the ICUC memory.
CTP1Updates2021-10-06. Service bulletin. EQUIPMENT. DetroitConnect follow-up customer communication for certain vehicles unable to complete over the air updates including parameters and DDEC over the air.
CTP1Updates2021-10-06. Service bulletin. EQUIPMENT. DetroitConnect customer communication for certain vehicles unable to complete over the air updates including parameters and DDEC over the air.
MYCOM_091321-32021-10-06. Service bulletin. EQUIPMENT. My Communication for Detroit Connect Over the Air Issue Update. This is an update for the previously communicated Over the Air functionality issue on CTP1s. We are currently testing a solution for the issue that is affecting these CTP1 telematics devices. While testing is not complete initial results are promising. The solution will require a soft ware update which is currently planned for October/November.
FAB2892021-08-31. Service bulletin. EQUIPMENT. Freightliner Action Bulletin for Cascadia Sleeper Cabinet Options. Improved cabinet options in sleeper models to increase storage and customize to the driver’s liking.
SS3085FTL-20212021-08-28. Service bulletin. EQUIPMENT. Service Solution for Cummins PTO functionality error software level 81Z-006. Cascadia/Western Star 49X with Cummins engines combined with software level 81Z-006. A programming bug in the central gateway (CGW) for software level 81Z-006 will not allow completion of the preset #2 PTO engine speed. During PTO speed request for anything greater than the #1 set speed , if the Cummins ECU software determines that the increase in speed isn't ramping fast enough, it will refer to an engine torque control setting instead of the engine speed control setting.
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.
FTLCAE182-20172021-05-17. Service bulletin. POWER TRAIN; EQUIPMENT. New DT12 Transmission for Original Cascadia
FTLCAE173-20172021-05-17. Service bulletin. EQUIPMENT; POWER TRAIN. Air-to-Oil Coolers for DT12 in New Cascadia
FTLCAE172-20172021-05-17. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; EQUIPMENT. New Accuride Aluminum Wheels

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