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K&N 33-2209 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   16 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 33-2209 Air Filter fits some Audi A4, Audi A4 Cabriolet, Audi A4 Quattro, Audi A4 Quattro Cabriolet, Audi Cabriolet, Audi Quattro, Audi RS4, Audi S4, and Seat Exeo 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
Height1.125 in (29 mm)
Outside Length10.313 in (262 mm)
Outside Width8.25 in (210 mm)
Package Contents1 Air Filter
Package Quantity1
Product StylePanel Air Filter
Weight0.9 lb (0.4 kg)
Filter Re-Oiling Amount1.37 oz (40 ml)
Product Box Height11.56 in (294 mm)
Product Box Length10.44 in (265 mm)
Product Box Width1.75 in (44 mm)

K&N 33-2209 Air Filter Product Reviews

Tuesday, October 17, 2017 - Part 33-2209
Great and quality product. Quick service and on time shipment. Thanks guys.

Kwame Ayesu-Attah
Point Roberts, Washington
Friday, September 29, 2017 - Part 33-2209
Fast delivery, easy install by removing section of plastic for air intake, then 2 screws at top of air box. Tight fit which is a good thing.

Newcastle Upon Tyne, United Kingdom
Tuesday, July 25, 2017 - Part 33-2209
K&N has always been and remains to be a superior product, always a perfect fit. I have put these in 7 different cars now, no issues no fitment problems. I am loyal to the brand and refer them :) Cheers

Robert Allen
Calgary, Canada
Friday, July 7, 2017 - Part 33-2209
A tad tight getting it into the airbox, but once installed, it gave a noticeable boost to acceleration.

Max Pachl
Austin, Texas
Monday, November 28, 2016 - Part 33-2209
Thought it would be easy to install. That is what the website said. NO.

Richard Feit
Boca Raton, Florida
Wednesday, October 5, 2016 - Part 33-2209
I got this for my 2006 Audi S4, and it's a perfect fit. For those that are wondering / hearing that the K&N filter doesn't fit in the stock air box on the B7 S4, it does indeed fit, but it helps if you install it in a certain way. I tried dropping it in top first and pushing the bottom edge in, but I couldn't make it fit. But when I tried the other way - inserting the bottom first and then squeezing in the top edge, it was much easier. The top edge of the box must have more flex or something. Considering how difficult it is to replace the filter, and how little room there is to work around the engine, I am thrilled that I can leave the K&N filter in there for 50k miles if I want. Well, maybe I'll check at 30k. I recently went out and purchased K&N for all my other vehicles.

Keith Zollman
Phoenix, Arizona
Thursday, August 11, 2016 - Part 33-2209
Excellent product. This is my first K&N filter I have bought, easy straight forwarded purchase and product selection, easy fitment. There is not a massive difference in my car but it does what it says on the tin, low and mid range throttle respone is definitely improved, car is more responsive. Overall very happy with the product right from purchase stage through to delivery, fitment and performance, and I got a sticker in the box Thanks very much K&N.

Mikey Smyth
Northern Ireland