K&N 33-3051 Air Filter

Replacement Filters / Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5     8 Customer Reviews
$62.99 USD
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Product Overview

  • Designed to increase horsepower
  • Washable, reusable, and engineered to last for the life of your vehicle
  • Designed to provide high airflow and exceptional filtration
  • Engineered to fit easily into your factory air box
  • 10-Year/Million Mile Limited Warranty
  • Only needs cleaning every 50,000 miles under normal highway driving conditions
  • Emissions legal in all 50 States
  • Will not void vehicle warranty
The K&N 33-3051 Air Filter fits some BMW 120i, BMW 125i, BMW 220i, BMW 230i, BMW 230i xDrive, BMW 320i, BMW 320i GT, BMW 330e, BMW 330i, BMW 330i GT, BMW 330i GT xDrive, BMW 330i xDrive, BMW 340i, BMW 340i GT, BMW 340i GT xDrive, BMW 340i xDrive, BMW 420i, BMW 420i Gran Coupe, BMW 430i, BMW 430i Gran Coupe, BMW 430i xDrive, BMW 430i xDrive Gran Coupe, BMW 440i, BMW 440i Gran Coupe, BMW 440i xDrive, BMW 440i xDrive Gran Coupe, BMW M140i, BMW M240i, and BMW M240i xDrive models. See vehicle applications link for details.
K&N® washable, reusable High-Flow Air Filters™ feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N’s 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N’s most popular product!

[More Information on K&N Replacement Air Filters]
Air Filter ShapeTrapezoidal
Filter MaterialCotton Gauze
Height1.25 in (32 mm)
Outside Length10.5 in (267 mm)
Outside Width10.25 in (260 mm)
Package Contents1 Air Filter
Package Quantity1
Warranty1,000,000 Miles/10 Year
Product StylePanel Air Filter
Weight1.2 lb (0.6 kg)
Filter Re-Oiling Amount1.47 oz (44 ml)
Product Box Height11.56 in (294 mm)
Product Box Length10.44 in (265 mm)
Product Box Width1.75 in (44 mm)
WARNING: Cancer and reproductive

K&N 33-3051 Air Filter Product Reviews

Monday, December 3, 2018 - Part 33-3051
Works as advertised.

Douglas Fechter
Mason, Ohio
Tuesday, November 13, 2018 - Part 33-3051
Thanks for the great service. I have put a K&N filter in every one of the cars that I have owned. What a difference. Will never go back to a stock filter ever again.

Derek Muir
Bracknell, United Kingdom
Thursday, October 11, 2018 - Part 33-3051
I don't feel or hear a big difference, very subtile... I think it is more the idea ;)

Saturday, June 23, 2018 - Part 33-3051
Hi, I am extremely happy with this filter that I bought for my BMW 340i (with MPPK). To all the sceptics out there, I've attached my dyno graph which shows significant gains in both power and torque (conservatively around 10wkw and 18NM respectively).

Sugandrian Naidoo
Fourways, South Africa
Thursday, December 21, 2017 - Part 33-3051
Have used K&N air filters with a number of my cars over the years. Have certainly noticed an increased response during acceleration and an improvement in MPG. Excellent durability and performance. Definitely recommended.

Jim A.
West Midlands, United Kingdom
Tuesday, October 3, 2017 - Part 33-3051
Super product, you can feel direct the difference between normal and K&N filter.

Alexander Bruijs
Kapellen, Belgium
Saturday, January 28, 2017 - Part 33-3051
Have always used K&N Filters on all my cars, does give better mpg and driveability.

Philip Burton
Standish, Wigan, United Kingdom
Wednesday, November 9, 2016 - Part 33-3051
Very simple to fit, literally 2 minutes. Makes a nice sucking induction noise on wide open throttle. Good purchase.

Hampshire, United Kingdom