51 21 150 Blocking, if necessary initializing, car key in immobilizer control module
WARNING: This page is about a different car, the 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Execution in diagnosis system:
-> Service functions->
-> Body->
-> Locking and security functions->
-> Remote control key
-> Service functions->
-> Body->
-> Locking and security functions->
-> Remote control key