2025 Mack MD technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Apr 9, 2026 Service bulletinCbr
• Apr 9, 2026 Service bulletinCbr
• Mar 19, 2026 Service bulletinCbr
• Mar 12, 2026 Service bulletinTSB
• Oct 22, 2025 Service bulletinCbr
• Aug 22, 2025 Service bulletinCbr
• Jul 28, 2025 Service bulletinCbr
• Jul 17, 2025 Service bulletinCbr
• Jul 8, 2025 Service campaignCbr
• May 27, 2025 Service bulletinMack DEF Level (UQLS) Sensor Troubleshooting Guide
• Mar 6, 2025 Service bulletinIf oil dilution is suspected refer to the applicable CBR solution below: ∙ CBR-659􀁡Mack Chassis
• Dec 9, 2024 Service campaignMack Trucks has identified that certain 2025 model year Mack Medium Duty (MMD) vehicles may have been...
• Dec 3, 2024 Service bulletinFrame lean can be caused by several seemingly isolated possibilities
• Nov 14, 2024 Service bulletinVehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned...
• Sep 13, 2024 Service bulletinCBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
• Aug 6, 2024 Service bulletinCBR: Diagnostic Trouble Code (DTC) U010187- Lost Communication With TECU
• Jul 2, 2024 Service bulletinCBR: Telematics Gateway (TGW) Connect Ability Issues
• Apr 22, 2024 Service bulletinCBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value...
• Apr 2, 2024 Service bulletinCBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
• Mar 1, 2024 Service bulletinCBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil