Generic 20-pin Reset Inspection & Oil Service Tool Automotive Diagnostic Cable OBDII for BMW (1982-2001) (Black) This cable allows you to connect a code reader or computer based diagnostic equipment to the BMW 20-pin port. Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database). Clear trouble codes and turn off the MIL ("Check Engine" light). This tool is used to reset inspection and oil service for BMW, mini and Rover 75 vehicles.