OBD, namely On-Board Diagnostic, is designed to monitor the running condition of the engine and the exhaust gas treatment system at all times. It will put the fault information into the memory unit. Then the content will be read out in a code format via the diagnostic tool and adapter. OBD connector refers to a diagnostic adapter used to read the ECU information. PA66, ABS+PC, or PBT is adopted for the connector’s plastic part, and nickel-plated brass, tin, or gilt for the metal part. The insertion and withdrawal life of Bennzs connector is averagely over 30 thousand.