This is a universal OBD II 16 pin male black connector of Slim-version. The OBD-2 connector must have pins 4, 5 for ground connections and pin 16 for 12V power supply from the vehicle battery. Prior to OBD, auto manufacturers did not standardize DTC’s (diagnostic trouble code). OBD-I begins standardized DTC’s. OBD-II added specific tests to determine the vehicle’s emission performance OBD-II adds more features, and is in the regulatory development phase. Many of old cars do not have 16 pin  connector.