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Service bulletins for the 2021 Freightliner 108SD

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.

135 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
SS 3124-FTL2026-05-02. Other. ELECTRICAL SYSTEM. Service Solution for Legacy M2 Bulkhead Module (BHM) Replacement and DiagnosticLink Issues
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)
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_Oil Plug Loc2026-01-08. Other. POWER TRAIN. Fleet Communications for NFD Lower Oil Plug Location - SP Axles
FleetCom_Heater Core2026-01-08. Other. ENGINE. Fleet Communications for Heater Core Plugging
CXA 10_25_Air Dryer Purge2025-11-06. Other. SERVICE BRAKES. CX Advocate for Experiencing Excessive Purging from Air Dryer
CXA_10_25_Conmet Oil Pan2025-11-05. Other. ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Issues
MYCOM_09022025-12025-10-03. Other. FUEL/PROPULSION SYSTEM. My Communications for UFI 0-Ring Announcement
PB33-004-FTL2025-07-08. Service bulletin. STEERING. Parts Bulletin for Tie Rod Assembly Part Breakdown
SS3124-FTL2025-06-27. Other. ELECTRICAL SYSTEM. Service Solution for Legacy M2 Bulkhead Module (BHM) Replacement and Diagnosticlink Issue
CXA 3_25_SAS01T to SAS03T2025-04-02. Other. STEERING. CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
CXA 3_25_NOx2025-04-02. Other. ENGINE. CX Advocate for NOx conversion low faults
CXA 2_25_Turbo Oil Drain2025-03-04. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 2_25_NOx2025-03-04. Other. ENGINE. CX Advocate for NOx conversion low faults
TSB54-373-FTL2025-03-04. Service bulletin. STEERING. Technical Service Bulletin for SAS01T to SAS03T Replacement Information
CXA 1_16_Turbo Oil Drain2025-01-29. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 1_16_Seat Occupancy2025-01-29. Other. SEATS. CX Advocate for repairing seat occupancy sensor (TSB 91-016-FTL)
CXA 1_16_NOx2025-01-29. Other. ENGINE. CX Advocate for NOx conversion low faults
CXA 1_16_DD13 Altitude2025-01-29. Other. ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
CXA 1_16_CARB Truck Chec2025-01-29. Other. ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check.
TSB35-039-FTL2025-01-03. Service bulletin. POWER TRAIN. Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management
TSB35-039-FTL2024-12-06. Service bulletin. POWER TRAIN. Revised Technical Service Bulletin for Detroit New Final Drive Standard Performance Forward Carrier Change to Top Performance Passive Lube Management.

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