Center bore and offset for F15 is unchanged from E70. Yes, the 20's from 2009 will work on 2015 unless the 2009 was X5M, X6 or X6M -- those will require that the rears be bored out.
You will need new RDC (tire pressure monitor). Part number is supposedly 36106856209 (you can check on realoem to make sure).
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