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OEM from the dealer only for me. Just not worth the trouble to buy anything different when the price is competitive at the dealer, and you don't know if the alternate products are built to the same spec or not. Mann and Mahle are examples of companies that build for both BMW and for aftermarket sales. There are many examples of filters being made (in the same physical size) to two different specs by a filter manufacturer, one for the OE supplier and a different spec for the aftermarket sale. Unless you have a way of determining the micron rating there is no way of knowing.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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