i think they're pretty much all the same.. matt black painted plastic..

I just ordered mine from ebay for $100... same matt black to swap out the stock silver ones for my AW 50i w/m-sport...

as long as it fits perfectly you should be fine... once on they all look the same..

good luck with your swap..

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2012 X5 50i M-Sport
2014 X3 35i M-Sport