I have one in the e46 (m54) and will be installing the same one/setup on the e53 (m54). This diagram is exactly what I followed and works amazing. My 330 was loosing oil. That ALL stopped once this was installed. Also the frequency you have to empty it, is not often. Actually I have yet to empty the one in the e46 since there isnt anything really to empty.


Link to tank I'm using: Godspeed Universal Racing Oil Catch Can Tank Oil Reservoir Tank Silver Color : Amazon.com : Automotive

I bought some heavier duty hose (nothing crazy) and again its been working great.

BTW you do NOT want a vented catch tank. Our motors must maintain crankcase vacuum