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K&N 33-2942 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   8 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 33-2942 Air Filter fits some BMW 116d, BMW 118d, BMW 120d, BMW 123d, BMW 316D, BMW 318d, BMW 320D, BMW 325d, BMW 330D, BMW 335d, BMW X1 16d, BMW X1 18d, BMW X1 20d, BMW X1 23d, and BMW X1 25d 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
Height1.5 in (38 mm)
Package Contents1 Air Filter
Package Quantity1
Product StyleUnique Air Filters
Width9.125 in (232 mm)
Length11.5 in (292 mm)
Weight1.5 lb (0.7 kg)
Filter Re-Oiling Amount2.05 oz (61 ml)
Product Box Height14 in (356 mm)
Product Box Length12.25 in (311 mm)
Product Box Width1.75 in (44 mm)

K&N 33-2942 Air Filter Product Reviews

Friday, February 23, 2018 - Part 33-2942
As described, fast delivery. Thanks.

Kevin Cooney
United Kingdom
Tuesday, November 21, 2017 - Part 33-2942
As always, another great K&N product. Will always buy from you guys, as you are the best.

R L Fielding
South Yorkshire, United Kingdom
Wednesday, April 5, 2017 - Part 33-2942
I can feel a better engine response, the fuel consumption dropped by roughly 20. Very happy with that buy so far.

Artur Szymanski
London, United Kingdom
Tuesday, January 17, 2017 - Part 33-2942
I have had a K&N flat replacement filter in my BMW 123d (and another in my wife's petrol powered Peugeot 207CC) for some two years now, and would not be without one. There are three benefits I've noticed in the BMW: 1) Better fuel economy 2) More power 3) A lovely engine grumble in city driving. I would recommend K&N for any vehicle.

Stewart Adam
Melbourne, Australia
Sunday, January 15, 2017 - Part 33-2942
I am very pleased with my purchase, the car feels more responsive after fitting the K&N panel filter. It was very easy to fit, even for an idiot like me.

Nick Nicholson
Waterlooville, United Kingdom
Wednesday, November 2, 2016 - Part 33-2942
This performance air filter has drastically changed the acceleration on my BMW 330d. I had a full remap 6 months ago, and with the new air filter, the engine can finally suck in the air it needs to. I will replace the air filter on every car I buy now. Thank you

Daniel Hill
Woking, United Kingdom
Tuesday, October 18, 2016 - Part 33-2942
I have a BMW E91 320d and after I placed the air filter and gave it a run, I noticed a better response in low rotations and a more powerful sound in 4000rpm. The turbo seams to kick earlier, and the acellerarion is faster. Good product!