K&N parts matching Mobil MA3999 air filter

The Mobil MA3999 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Mobil air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Stuart Greene, Oak Park, Illinois
Instantly noticeable increase in pep, take-off and engine strain noise (reduced) in a high mileage VW Jetta that just had a new air filter placed 6 months previous. Second K&N filter owned on my vehicles and I cannot say enough positive about them. The hype is not an exaggeration.
Anguel Dimitrov, Southfield, Michigan
Rock and Roll...quality filter, fits like the original one, and most important the car is running much better. I can fill when I have to accelerate...and I am sure going to save little on gas..super.
Clarke Hall, Cambridge, Canada
This filter is in my 2011 Jetta. I instantly noticed relief on the engine, way more air flow with little restriction. Best filter on the market and K&N is the only brand that I would suggest to put in your vehicle. Cabin filter, air filter, and oil filter.... K&N all the way . Plus, million mile warranty, can't beat that.
33-2331 K&N 33-2331 Replacement Air Filter
List Price: $78.19
Your Price: $50.99