alt Hacker NewsYou win some, you lose some. Comparable process on my E46 and E39: Drain plug out (potentially flipping a little dust cover out of the way). Drain plug in. Stand up because everything else happens up top. Unscrew filter housing. Replace filter element. Replace filter housing. Fill.
E90 is the same but you’re supposed to loosen the filter because otherwise some vacuum holds in an extra 0.5L of oil.
I like the top mount oil filters, less mess.