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Audi S4 Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Audi S4 air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Audi S4 Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Audi S4 run better. Fast and FREE SHIPPING with any Audi S4 air filter

  1. 2025 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  2. 2024 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  3. 2023 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  4. 2022 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  5. 2021 Audi S4 3.0L V6 Diesel air filter
    CZK 2,909.99
    E-0646
    K&N
  6. 2020 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  7. 2019 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  8. 2018 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  9. 2017 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  10. 2016 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  11. 2016 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-0646
    K&N
  12. 2015 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  13. 2014 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  14. 2013 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  15. 2012 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  16. 2011 Audi S4 3.2L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  17. 2011 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  18. 2010 Audi S4 3.2L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  19. 2010 Audi S4 3.0L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  20. 2009 Audi S4 3.2L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  21. 2009 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  22. 2009 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  23. 2008 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  24. 2008 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  25. 2008 Audi S4 3.2L V6 Gas air filter
    CZK 2,909.99
    E-1987
    K&N
  26. 2007 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  27. 2007 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  28. 2006 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  29. 2006 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  30. 2005 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  31. 2005 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  32. 2004 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  33. 2004 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  34. 2003 Audi S4 4.2L V8 Gas air filter
    CZK 615.89
    KNA-2209
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI A4/RS4/S4/ SEAT EXEO
  35. 2003 Audi S4 4.2L V8 Gas air filter
    CZK 2,279.39
    33-2209
    K&N
  36. 2002 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  37. 2002 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  38. 2001 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  39. 2001 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  40. 2000 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  41. 2000 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  42. 1999 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  43. 1999 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  44. 1998 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  45. 1998 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  46. 1997 Audi S4 2.7L V6 Gas air filter
    CZK 2,279.39
    33-2125
    K&N
  47. 1997 Audi S4 2.7L V6 Gas air filter
    CZK 615.89
    KNA-2125
    K&N LONG LIFE 18,000 MILE ENGINE AIR FILTER - AUDI / SKODA / VW
  48. 1994 Audi S4 2.2L L5 Gas air filter
    CZK 2,279.39
    33-2029
    K&N
  49. 1993 Audi S4 2.2L L5 Gas air filter
    CZK 2,279.39
    33-2029
    K&N
  50. 1992 Audi S4 2.2L L5 Gas air filter
    CZK 2,279.39
    33-2029
    K&N
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