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E46 3 Series K&N Performance Air Filter

Designer: K&N


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  • 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 33-2231 fits some BMW 316Ci, BMW 316i, BMW 318Ci, BMW 318i, BMW 318ti, BMW 320Ci, BMW 320i, BMW 323Ci, BMW 323i, BMW 325Ci, BMW 325i, BMW 325Ti, BMW 325Xi, BMW 328Ci, BMW 328i, BMW 330Ci, BMW 330i, BMW 330Xi, BMW M3, and BMW X3 models.

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