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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
    Regular Price RON 534.19 Special Price RON 427.39
    33-2970
    K&N
  2. 2010 BMW 523i 3.0L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2970
    K&N
  3. 2010 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  4. 2010 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  5. 2009 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  6. 2009 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  7. 2008 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  8. 2008 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  9. 2007 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  10. 2007 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  11. 2006 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  12. 2006 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  13. 2005 BMW 523i 2.5L L6 Gas air filter
    RON 129.19
    KNA-2292
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - BMW 525i/ 2.5L-L6
  14. 2005 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 534.19 Special Price RON 427.39
    33-2292
    K&N
  15. 2000 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
  16. 1999 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
  17. 1998 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
  18. 1997 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
  19. 1996 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
  20. 1995 BMW 523i 2.5L L6 Gas air filter
    Regular Price RON 478.19 Special Price RON 382.59
    33-2070
    K&N
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