BMW 20 Pin OBD2 Adapter cable can be used to connect your BMW's 20PIN OBD socket to OBD2 Compatible Diagnostic Tools.
On one side you have the BMW 20PIN OBD male plug and on the other end you have the 16pin OBD2 female plug.
OBD2 16Pin (Female) BMW 20Pin (Male)
4,5-------------------------------------19(Ground)
7------------------------------------17,20(K Line)
15---------------------------------------15(L Line)
16---------------------------------------14(Power)
Please note that this is an adapter cable and not a cable with an interface