Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
CBR 159 202608
Service Bulletin/Repair Instructions
Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
CBR-2592-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
CBR 2362-3 202604
Service Bulletin/Repair Instructions
CBR - Mack Carrier Nut Adhesive Change.
CBR 2573-1 202604
Service Bulletin/Repair Instructions
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2712-7 032026
Service Bulletin/Repair Instructions
CBR - No Start Condition After Over the Air Programing.
CBR 2246-5 032026
Service Bulletin/Repair Instructions
CBR - Z Spring Bracket Wear.
CBR 199 202512
Service Bulletin/Repair Instructions
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR 2171-11 202511
Service Bulletin/Repair Instructions
CBR - Mack Temperature Sensor Troubleshooting Guide
CBR 199-6 202511
Service Bulletin/Repair Instructions
CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.
CBR 2517-1 102025
Service Bulletin/Repair Instructions
CBR - Wiper Linkage Inspection.
S4579 092025
Service Campaign
Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware.
S4584 092025
Service Campaign
The vehicle’s steering shaft support bracket may have been assembled with incorrect hardware.
CBR 2172-5 082025
Service Bulletin/Repair Instructions
CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.