Condition:NewCompatibility:OBD2Used to connect a diagnostic tool with an OBD2 16 pin plug (male) to a 20 Pin BMW socket. This WILL NOT make your diagnostic scanner backward compatible with older BMWs.Pin-out DiagramOBDII Female--------BMW(20Pin) 4，5------------------19(Ground) 7---------------------17，20(K Line) 15-------------------15(L Line) 16-------------------14(Power)