51 21 150 Blocking, If Necessary Initializing, Car Key In Immobilizer Control Module
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 135i, and 2010 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
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Execution in diagnosis system (BMW diagnosis system): Service functions, Body, Locking and security functions, Remote control key