Audi A4 Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Audi A4 air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Audi A4 Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Audi A4 run better. Fast and FREE SHIPPING with any Audi A4 air filter

  1. 2024 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  2. 2024 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  3. 2024 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  4. 2023 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  5. 2023 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  6. 2023 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  7. 2022 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  8. 2022 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  9. 2022 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  10. 2022 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  11. 2021 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  12. 2021 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  13. 2021 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  14. 2021 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  15. 2020 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  16. 2020 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  17. 2020 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  18. 2020 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  19. 2019 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  20. 2019 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  21. 2019 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  22. 2019 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  23. 2018 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  24. 2018 Audi A4 1.4L L4 Gas air filter
    $79.99
    E-0646
    K&N
  25. 2018 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  26. 2018 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  27. 2018 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  28. 2017 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  29. 2017 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  30. 2017 Audi A4 1.4L L4 Gas air filter
    $79.99
    E-0646
    K&N
  31. 2017 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  32. 2017 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  33. 2016 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  34. 2016 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  35. 2016 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  36. 2016 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  37. 2016 Audi A4 1.4L L4 Gas air filter
    $79.99
    E-0646
    K&N
  38. 2016 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-0646
    K&N
  39. 2016 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  40. 2015 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  41. 2015 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  42. 2015 Audi A4 2.0L L4 Diesel air filter
    $149.99
    E-0653
    K&N
  43. 2015 Audi A4 2.0L L4 Diesel air filter
    $99.99
    E-0648
    K&N
  44. 2015 Audi A4 3.0L V6 Gas air filter
    $79.99
    E-1987
    K&N
  45. 2015 Audi A4 2.0L L4 Gas air filter
    $79.99
    E-0646
    K&N
  46. 2015 Audi A4 2.0L L4 Gas air filter
    $99.99
    E-0647
    K&N
  47. 2015 Audi A4 1.4L L4 Gas air filter
    $79.99
    E-0646
    K&N
  48. 2014 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  49. 2014 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  50. 2014 Audi A4 2.0L L4 Diesel air filter
    $149.99
    E-0653
    K&N
  51. 2014 Audi A4 3.0L V6 Gas air filter
    $79.99
    E-1987
    K&N
  52. 2013 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  53. 2013 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  54. 2013 Audi A4 2.0L L4 Diesel air filter
    $149.99
    E-0653
    K&N
  55. 2013 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  56. 2013 Audi A4 4.2L V8 Gas air filter
    $54.99
    33-3031
    K&N
  57. 2013 Audi A4 4.2L V8 Gas air filter
    $54.99
    33-3032
    K&N
  58. 2012 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  59. 2012 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  60. 2012 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  61. 2011 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  62. 2011 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  63. 2011 Audi A4 2.7L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  64. 2011 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  65. 2011 Audi A4 3.2L V6 Gas air filter
    $79.99
    E-1987
    K&N
  66. 2010 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  67. 2010 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  68. 2010 Audi A4 2.7L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  69. 2010 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  70. 2010 Audi A4 3.2L V6 Gas air filter
    $79.99
    E-1987
    K&N
  71. 2009 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  72. 2009 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  73. 2009 Audi A4 2.7L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  74. 2009 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  75. 2009 Audi A4 4.2L V8 Gas air filter
    $79.99
    E-1987
    K&N
  76. 2009 Audi A4 3.2L V6 Gas air filter
    $79.99
    E-1987
    K&N
  77. 2008 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  78. 2008 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2945
    K&N
  79. 2008 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  80. 2008 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  81. 2008 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  82. 2008 Audi A4 2.7L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  83. 2008 Audi A4 3.0L V6 Diesel air filter
    $79.99
    E-1987
    K&N
  84. 2008 Audi A4 4.2L V8 Gas air filter
    $79.99
    E-1987
    K&N
  85. 2008 Audi A4 3.2L V6 Gas air filter
    $64.99
    33-2209
    K&N
  86. 2008 Audi A4 3.2L V6 Gas air filter
    $79.99
    E-1987
    K&N
  87. 2007 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  88. 2007 Audi A4 3.2L V6 Gas air filter
    $64.99
    33-2209
    K&N
  89. 2007 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  90. 2007 Audi A4 2.7L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  91. 2007 Audi A4 3.0L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  92. 2007 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  93. 2007 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  94. 2007 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2945
    K&N
  95. 2007 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  96. 2007 Audi A4 4.2L V8 Gas air filter
    $64.99
    33-2209
    K&N
  97. 2006 Audi A4 3.2L V6 Gas air filter
    $64.99
    33-2209
    K&N
  98. 2006 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  99. 2006 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  100. 2006 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  101. 2006 Audi A4 2.7L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  102. 2006 Audi A4 3.0L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  103. 2006 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  104. 2006 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  105. 2006 Audi A4 4.2L V8 Gas air filter
    $64.99
    33-2209
    K&N
  106. 2005 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  107. 2005 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  108. 2005 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  109. 2005 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  110. 2005 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  111. 2005 Audi A4 2.7L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  112. 2005 Audi A4 3.2L V6 Gas air filter
    $64.99
    33-2209
    K&N
  113. 2005 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  114. 2005 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  115. 2005 Audi A4 4.2L V8 Gas air filter
    $64.99
    33-2209
    K&N
  116. 2004 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  117. 2004 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  118. 2004 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  119. 2004 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  120. 2004 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  121. 2004 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  122. 2004 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  123. 2003 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  124. 2003 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  125. 2003 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  126. 2003 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  127. 2003 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  128. 2003 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  129. 2003 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  130. 2003 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  131. 2002 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2209
    K&N
  132. 2002 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  133. 2002 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  134. 2002 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  135. 2002 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  136. 2002 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  137. 2002 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2209
    K&N
  138. 2002 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  139. 2001 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  140. 2001 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  141. 2001 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  142. 2001 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2209
    K&N
  143. 2001 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2209
    K&N
  144. 2001 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  145. 2001 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2125
    K&N
  146. 2001 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  147. 2001 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  148. 2001 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2125
    K&N
  149. 2001 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  150. 2000 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  151. 2000 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  152. 2000 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  153. 2000 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2125
    K&N
  154. 2000 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2209
    K&N
  155. 2000 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  156. 2000 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  157. 2000 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  158. 2000 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2125
    K&N
  159. 2000 Audi A4 2.0L L4 Gas air filter
    $64.99
    33-2209
    K&N
  160. 2000 Audi A4 3.0L V6 Gas air filter
    $64.99
    33-2209
    K&N
  161. 1999 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  162. 1999 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  163. 1999 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2125
    K&N
  164. 1999 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  165. 1999 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  166. 1999 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  167. 1999 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2125
    K&N
  168. 1999 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  169. 1998 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  170. 1998 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  171. 1998 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2125
    K&N
  172. 1998 Audi A4 2.5L V6 Diesel air filter
    $64.99
    33-2125
    K&N
  173. 1998 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  174. 1998 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  175. 1998 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  176. 1998 Audi A4 2.7L V6 Gas air filter
    $64.99
    33-2125
    K&N
  177. 1997 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  178. 1997 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  179. 1997 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  180. 1997 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  181. 1997 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  182. 1997 Audi A4 2.4L V6 Gas air filter
    $64.99
    33-2125
    K&N
  183. 1996 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  184. 1996 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  185. 1996 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  186. 1996 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  187. 1996 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  188. 1995 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
  189. 1995 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  190. 1995 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  191. 1995 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  192. 1995 Audi A4 1.6L L4 Gas air filter
    $64.99
    33-2125
    K&N
  193. 1994 Audi A4 1.9L L4 Diesel air filter
    $64.99
    33-2125
    K&N
  194. 1994 Audi A4 2.6L V6 Gas air filter
    $64.99
    33-2125
    K&N
  195. 1994 Audi A4 2.8L V6 Gas air filter
    $64.99
    33-2125
    K&N
  196. 1994 Audi A4 1.8L L4 Gas air filter
    $64.99
    33-2125
    K&N
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