Any experience with K &N drop in air filter
09-13-2012, 02:25 PM
#1
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I was looking to buy a replacement air filter from K &N to put in my 2009 535 xdrive.
Has anyone had any issues with this filter in their car? There have been some stories about it causing problems in Mercedes and Volvo.
Let me know what your experience has been good or bad.
Thanks!
Has anyone had any issues with this filter in their car? There have been some stories about it causing problems in Mercedes and Volvo.
Let me know what your experience has been good or bad.
Thanks!
09-14-2012, 10:39 AM
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My Ride: 2008 535i:
(8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans
Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps
Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
Shouldn't be any problem with a drop-in. I switched to a BMS open air filter (similar in build to a K&N) and haven't looked back.
09-14-2012, 10:53 AM
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My Ride: Alpine White 2010 535 M-Sport
Is the "open air" setup also referred to as the dual cone? Im looking into intake and air filter mods. Just curious to hear reviews etc. Thanks.
09-14-2012, 11:53 AM
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My Ride: 2014 535 Alpine White
09-14-2012, 01:05 PM
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My Ride: 2008 535i:
(8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans
Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps
Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
You will definitely hear the turbos wind up after installing it.
09-14-2012, 01:44 PM
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My Ride: 05 545i 6MT
Instead buy my slight used KNN Shameless plug
https://5series.net/forums/topic/103...1#entry1237610
09-16-2012, 10:24 AM
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My Ride: 04 545i - Titanium Silver/Black, Sport pkg, Comfort Seats w/ Lumbar, Premium Sound, power rear sunshade, Adaptive Xenon Headlights, Steptronic, Park Distance Control, Fold down rear seats w/ski bag, Aux jack, 6-disk changer, puddle lamps...
Engine: Custom Remus cat-back exhaust w/chrome square tips, K&N Air Filter, Charcoal Filter Removed, Sprint Booster :-), 50/50 mix of 91+100 Octane, EuroRev ECU Remap (coming soon lol), Dinan High-Flow Throttle Body (coming soon...maybe lol)
Interior: Portable Sirius Stilletto 100 w/car kit, Garmin Nuvi 680 mounted below rear-view mirror, LCI-style I-drive knob, Dark Poplar Center Dashboard Trim.
Exterior: E60 forum clings, 5% rear tint, ACS roof spoiler (painted black for distinct look against limo tint), ACS trunk spoiler, ACS add-on front spoiler and rear apron (awaiting installation), "18 Black Staggered BeBeS Style OER (emergency replacement for cracked sport 124 rims), black kidney grill, white accessory lighting (including license and trunk lamps), Angel-eye upgrade, AIB xenon-matched fog lamps, AIB V3's on order, red rear reflectors
I've had my K&N for a few years. I wash n oil it every 20k miles or so. I clean the MAF every 10k or so to prevent any possible fouling of the sensor from the filter oil. Not much else needs to be done.
09-16-2012, 05:51 PM
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My Ride: Alpine E60, '09 535i-Premium, Sport and Comfort Access PackageMods: Lux H8 V3 Angel Eyes, Weisslicht LED license plate lights, Interior LED lights, RPI Scoop, Matte Black Grills, Smoked LED side markers & side reflectors, 35% tint all around, and a 3
I switch my filter out for a k&n drop-in and haven't seen any issues. You don't have to worry about the maf issue since the N54 engines don't have a maf to foul up. 
09-19-2012, 05:15 PM
#10
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I have a K&N in all 4 BMW's right now. Never had an issue. But do take a shop towel to it and try to get off excess oil before putting in and do not over oil when recharging. Recharge about every 25K mi or so. Clean the MAFS while you're at it just in case.