540 fuel filter

[scott540]

Does it have 2 of them? If so, Why? Thanks

[DrewZ]

Early 540s (and 530s) have a dual-filter setup. I had the dual-filter setup on my 3/93-build 530iT, then switched to the single-filter from the later models. The single-filter is the same diameter as each of the dual-filters, but is twice as long. I installed the single-filter in the lower of the two slots on the stock filter-holder.

Drew Zacharda
6-speed Touring
http://members.aol.com/apzjd/newavatar.jpg (http://www.bmwe34.net/ASP/DURegistry/RegDetail.asp?id=100)


Does it have 2 of them? If so, Why? Thanks

[scott540]

Mine's a 2/95 build date and there are 2 cans under there. I was just wondering why they used 2 instead of like you said, one big one. Probably so I can buy two filters instead of one.

[tim s]

you will see that the filters are installed parallel, not inline. this way there is less restriction for fuel flow. it's like having a dual exhaust for the fuel system. a single filter might cause the fuel pump to work harder. the 540i/a fuel pump feeds 50psi to the fuel rail. i have 2 & my build date is 4/94. 2 new filters are not really all that expensive.
tim s.

[David Chen]

My 05/95 production date car has one filter.

Cheers,

David