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33-2428
$60.99 USD
MSRP $94.39 35.4% Off
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K&N 33-2428 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   20 Customer Reviews
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
The K&N 33-2428 Air Filter fits some BMW 535i, BMW 535i GT, BMW 535i GT xDrive, BMW 535i xDrive, BMW 640i, BMW 640i Gran Coupe, BMW 640i xDrive, BMW 640i xDrive Gran Coupe, BMW 640i xDrive Gran Turismo, BMW 740i, BMW 740iL, BMW 740Li, BMW 740Li xDrive, BMW ActiveHybrid 5, BMW ActiveHybrid 7, BMW X3, BMW X3 35i, BMW X3 xDrive28i, BMW X3 xDrive35i, BMW X4, BMW X5, BMW X5 xDrive35i, BMW X6, and BMW X6 xDrive35i models. See vehicle applications link for details.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
WashableYes
Height1.25 in (32 mm)
Outside Length10.75 in (273 mm)
Outside Width10.25 in (260 mm)
Package Contents1 Air Filter
Package Quantity1
Warranty1,000,000 Miles/10 Year
Product StylePanel Air Filter
Weight1.6 lb (0.7 kg)
Filter Re-Oiling Amount1.74 oz (51 ml)
Product Box Height14 in (356 mm)
Product Box Length12.25 in (311 mm)
Product Box Width1.75 in (44 mm)
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov

K&N 33-2428 Air Filter Product Reviews

Tuesday, August 7, 2018 - Part 33-2428
Fast shipping, Installed in a BMW 3.5 M-sport, no noticeable difference in power or acceleration but I guess it's better than stock air filter?

Julian Moodie
Chester, Canada
Thursday, May 31, 2018 - Part 33-2428
Great quality and fast delivery. I love the Air Filter and how it let’s more Air into the engine.

Rami Suleiman
Dubai, United Arab Emirates
Tuesday, December 19, 2017 - Part 33-2428
For every vehicle I purchase for myself or the family, the next purchase is a K&N filter system. Great product, great performance. Pls send me the notification decals to place on the air breather cover to advise the shops not to change the filter. That's always helpful for me and good advertisement for you. thx

William Susong
Talbott, Tennessee