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K&N Air Intake Systems for the BMW 523i

BMW 523i Performance Air Intake Systems

If you are looking to improve performance, K&N BMW 523i air intakes are easy to install and come with a million mile limited warranty.
  • Designed to increase horsepower and torque
  • K&N Million Mile Limited Warranty®
  • Replaces restrictive factory air intake system
  • Easy to install performance
Buy now from the K&N Store and get a 100% money back guarantee and free shipping on any air intake!

Add horsepower to your BMW 523i with a K&N air intakes.
K&N Air Intake Systems
Vehicle DescriptionPart NumberProduct Image 
2000 BMW 523i 2.5L L6 F/I - to 9/00
Automotive
2000 BMW 523i 2.5L Air Intake
57-0439 57-0439 523i 57i Kit Air Intake
List Price: $261.92
Factory Direct Price: $143.99
1999 BMW 523i 2.5L L6 F/I - All
Automotive
1999 BMW 523i 2.5L Air Intake
57-0439 57-0439 523i 57i Kit Air Intake
List Price: $261.92
Factory Direct Price: $143.99
1998 BMW 523i 2.5L L6 F/I - from 9/98
Automotive
1998 BMW 523i 2.5L Air Intake
57-0439 57-0439 523i 57i Kit Air Intake
List Price: $261.92
Factory Direct Price: $143.99