Since the wheels were on a 5 series before, they are most likely not going to fit. E39 chassis use very aggressive offsets front and rear. Since you have a E90, the rears may be able to fit. But the front will be very difficult. Conservative offsets for the front of a E39 are in the mid ET20s or ET15 for a 8.5" wheel. That auction ended though so...I guess I was too late, haha.
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