$51.99 USD
MSRP $80.39 35.3% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N 33-2070 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   19 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 33-2070 Air Filter fits some BMW 320i, BMW 323Ci, BMW 323i, BMW 323iS, BMW 323Ti, BMW 325Ci, BMW 325i, BMW 325iS, BMW 328Ci, BMW 328i, BMW 328ic, BMW 328iS, BMW 520i, BMW 523i, BMW 525i, BMW 528i, BMW 530i, BMW 728i, BMW 728iL, BMW M Coupe, BMW M3, BMW X3, BMW Z3, and BMW Z4 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 in (25 mm)
Outside Length9.25 in (235 mm)
Outside Width6.875 in (175 mm)
Package Contents1 Air Filter
Package Quantity1
Product StylePanel Air Filter
Top StyleOpen
Weight0.8 lb (0.3 kg)
Filter Re-Oiling Amount1 oz (30 ml)
Product Box Height9.69 in (246 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Inner WireNo

K&N 33-2070 Air Filter Product Reviews

Friday, December 29, 2017 - Part 33-2070
Good website, best price available online, informative updates and quick delivery. The product itself, very easy to fit in my BMW Z3 and noticeable improvement in acceleration and responsiveness. Haven't noticed any improvement in economy just yet. Many thanks, excellent product.

Malcolm Brown
Durham, United Kingdom
Monday, November 20, 2017 - Part 33-2070
Product fitment and quality are excellent. It is basically plug and play. Good reasonable price for the good you receive. However I did not notice significant performance improvement over the stock paper filter when you drive it. Perhaps you need to perform dyno test to be able to see the improvement.

Iwan Pribadi
Jakarta Utara, Indonesia
Monday, November 20, 2017 - Part 33-2070
Great filter, definitely an improvement over the oem BMW air filter (E36 320i coupe owner).

José Brito
Moita/Alhos Vedros, Portugal
Thursday, July 27, 2017 - Part 33-2070
The best.

Ivan Georgiev
Stara Zagora, Bulgaria
Sunday, May 28, 2017 - Part 33-2070
BMW wanted $110 to replace my air filter. For less than half of that, I got a better filter that will last a lifetime. K&N is the only way to go. Thanks K&N.

David Biersach
Bluffton, South Carolina
Friday, April 7, 2017 - Part 33-2070
I have purchased filters in the past and always find this trouble free and fast. As we live in New Zealand, this is not always the case.

John Cresswell
Auckland, New Zealand
Tuesday, November 8, 2016 - Part 33-2070
It went in fast and my Beemer thanked me for opening up it's air passageways so it can breathe in our dusty, dirty, haboob laced, air here in the valley of the sun.

Michael Anderson
Chandler, Arizona