is the Foam on underside of Air Filter Necessary?
09-07-2009, 12:45 PM
#1
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My Ride: White 2004 545i sport
I removed the air box cover to clean the airbox and check the filter.
I removed the charcoal filter while I was at it.
I noticed the Foam was peeling off of the bottom of the filter, so I tore it off for now.... The only reason I could imagine this would be on the air filter is to prevent water(rain) from getting in the engine. Do you think I need it there? or should I just go get a new filter?
I removed the charcoal filter while I was at it.
I noticed the Foam was peeling off of the bottom of the filter, so I tore it off for now.... The only reason I could imagine this would be on the air filter is to prevent water(rain) from getting in the engine. Do you think I need it there? or should I just go get a new filter?
09-07-2009, 01:04 PM
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My Ride: 2006 530i
i remember doing the charcol filter removal mod and a few members were finding a piece of white foam when they cleaned out the airbox??? if you can post a pic of this foam would be helpful.
09-07-2009, 01:23 PM
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My Ride: 2005 330I ZHP
The foam part of the filter acts like a Prefilter for the Air Filter... I had one on my ZHP. I just replaced it with a K&N Drop in Filter. Its not a Requirement but its nice to have....
09-07-2009, 02:11 PM
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My Ride: 545i Sport
Model Year: 2004
Engine: N62
Originally Posted by BET530' post='1001096' date='Sep 7 2009, 02:04 PM
i remember doing the charcol filter removal mod and a few members were finding a piece of white foam when they cleaned out the airbox??? if you can post a pic of this foam would be helpful.
Standard equipment on some lucky member's 545i
09-07-2009, 02:57 PM
#5
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My Ride: White 2004 545i sport
Originally Posted by Rizbel' post='1001143' date='Sep 7 2009, 03:11 PM
HAHA.. No, its not that foam.. that just looks like debris that was sucked in...
If you look under the OEM air filter after you pull it out, there is a gray foam layer glued to it.
09-07-2009, 04:24 PM
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My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
For performance sake, to REALLY lighten the car (more than just a small piece of foam) remove the floormats!! 
09-08-2009, 06:37 AM
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I think that there is something to this.
Many of us have found the same little white piece of foam.
I guess the foam is fine, but some of the foam had broken off into little white flakes that seemingly could get into the air intake.
Many of us have found the same little white piece of foam.
I guess the foam is fine, but some of the foam had broken off into little white flakes that seemingly could get into the air intake.
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