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How to Add a Key to BMW CAS4 System Using KEYDIY KD-X4 and KD-EPA (2009 730Li)

How to Add a Key to BMW CAS4 System Using KEYDIY KD-X4 and KD-EPA (2009 730Li)

Step-by-step guide to safely add a key to a 2009 BMW 730Li (CAS4) using KEYDIY KD-X4 programmer, KD-EPA adapter, and bench reading. Avoid OBD corruption.

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