Bosch 66-13928-001 Telematics Control Unit is a Bosch-manufactured telematics module built for Freightliner Cascadia heavy-duty trucks. As the vehicle's telematics control unit, it handles data communication between the truck and fleet-management systems. Part number 66-13928-001 identifies this specific Bosch module used in Freightliner Cascadia big rig configurations.
