BMW 523i Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any BMW 523i air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for BMW 523i Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your BMW 523i run better. Fast and FREE SHIPPING with any BMW 523i air filter

  1. 2011 BMW 523i 3.0L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2970
    K&N
  2. 2010 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  3. 2010 BMW 523i 3.0L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2970
    K&N
  4. 2009 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  5. 2008 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  6. 2007 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  7. 2006 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  8. 2005 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2292
    K&N
  9. 2000 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
  10. 1999 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
  11. 1998 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
  12. 1997 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
  13. 1996 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
  14. 1995 BMW 523i 2.5L L6 Gas air filter
    $64.99 Regular Price $58.49 Special Price
    33-2070
    K&N
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