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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   18 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 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
Height1.25 in (32 mm)
Outside Length10.75 in (273 mm)
Outside Width10.25 in (260 mm)
Package Contents1 Air Filter
Package Quantity1
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)

K&N 33-2428 Air Filter Product Reviews

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
Tuesday, December 12, 2017 - Part 33-2428
Great air intake filters, much better car performance. Excellent quality. Thank you

Jose l Aciar
Brooklyn, New York
Thursday, December 7, 2017 - Part 33-2428
Another great K&N filter, that fit right in like a glove in my 2017 BMW X5. I could feel the difference the first time I jumped on it on the highway. It was quick before, but you can feel even more zip off the get-go with the increased air that the K&N is providing.

Paul Fineberg
Woodbridge, Virginia
Tuesday, November 21, 2017 - Part 33-2428
Excellent product. This is the second set of K&N filters that I have purchased this year. The other set were for my Audi R8 V10. Both installs were fairly straight forward. I love the sound and the noticeable increase in horsepower. I will always install K&N for any vehicle that I own or may own in the future. Cheers,

Abbas Khan
Milton, Canada
Thursday, January 19, 2017 - Part 33-2428
Efficient search tools. Resulting pages have just enough information to make informed product decisions; minimal fluff, maximum product details. Buying merchandise from your company/website (giving you my money), couldn't be easier. A lot of websites for auto assecories - but should I need anything else, your site will be the first I search on. Thanks

Richard Bowell
Woodsboro, Maryland
Tuesday, June 14, 2016 - Part 33-2428
Easy to install. Haven't noticed more power.

Peter Coffee
Walnut Creek, California
Wednesday, May 11, 2016 - Part 33-2428
Filter installed with ease, had to have special screw driver to undo screws holding the cover. All seems fine, have the same type filter in my 1995 Yukon and it is still clean. Great product. Also have your Oil Filter in the Yukon and have used them for years.

David Schweitzer
Costa Mesa, California