Mastertech II is a Bosch J2534-1 and J2534-2 vehicle communication interface for OEM reprogramming and diagnostic applications. Bosch lists wired and wireless connections and validation with selected OEM reprogramming applications; check the current OEM requirements for the specific operation.
Vehicle coverage, functions, vehicle-maker approval, operating system, driver version, subscriptions and security authorisation must be checked for the exact vehicle and job. Follow the vehicle manufacturer’s programming procedure and specified stable power supply. A J2534 interface does not by itself supply OEM software or guarantee every function.
Source
Manufacturer product or support information, accessed 10 November 2026.