K&N Panel Filter for an A3/S3 is p/n 33-2128 and will fit the following cars:
2004 AUDI A3 3.2L V6 F/I - 250BHP, 24v
2004 AUDI RS4 2.7L V6 F/I - Bi-Turbo, Quattro
2004 AUDI TT 1.8L L4 F/I - All
2004 SEAT LEON 1.9L L4 DSL - All
2004 VOLKSWAGEN BEETLE 1.6L L4 F/I - 102BHP, 8v, OHC
2004 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
2004 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
2004 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
2004 VOLKSWAGEN GOLF 1.8L L4 F/I - Turbo
2004 VOLKSWAGEN GOLF 1.9L L4 DSL - Turbo
2004 VOLKSWAGEN GOLF 2.0L L4 F/I - All
2004 VOLKSWAGEN GOLF 2.8L V6 F/I - VR6
2004 VOLKSWAGEN GTI 1.8L L4 F/I - Turbo
2004 VOLKSWAGEN GTI 2.8L V6 F/I - All
2004 VOLKSWAGEN JETTA 1.8L L4 F/I - Turbo
2004 VOLKSWAGEN JETTA 1.9L L4 DSL - Turbo
2004 VOLKSWAGEN JETTA 2.0L L4 F/I - All
2004 VOLKSWAGEN JETTA 2.8L V6 F/I - VR6
2003 AUDI A3 3.2L V6 F/I - 250BHP, 24v
2003 AUDI S3 1.8L L4 F/I - Non-US, Quattro
2003 AUDI TT 1.8L L4 F/I - All
2003 SEAT LEON 1.9L L4 DSL - All
2003 VOLKSWAGEN BEETLE 1.6L L4 F/I - 102BHP, 8v
2003 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
2003 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
2003 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
2003 VOLKSWAGEN BORA 1.8L L4 F/I - 180BHP, 20v
2003 VOLKSWAGEN BORA 1.9L L4 DSL - Non-US, All BHP models
2003 VOLKSWAGEN BORA 2.0L L4 F/I - 115BHP, OHC
2003 VOLKSWAGEN BORA 2.3L V5 F/I - 170BHP
2003 VOLKSWAGEN BORA 2.8L V6 F/I - 204BHP
2003 VOLKSWAGEN GOLF 1.8L L4 DSL - Turbo
2003 VOLKSWAGEN GOLF 1.8L L4 F/I - 180BHP, 20v, Turbo
2003 VOLKSWAGEN GOLF 1.9L L4 DSL - Turbo
2003 VOLKSWAGEN GOLF 2.0L L4 F/I - All
2003 VOLKSWAGEN GOLF 2.8L V6 F/I - All
2003 VOLKSWAGEN GOLF 3.2L V6 F/I - 241BHP, R32
2003 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models, Turbo 68BHP
2003 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 170BHP
2003 VOLKSWAGEN GTI 1.8L L4 F/I - Turbo
2003 VOLKSWAGEN GTI 2.8L V6 F/I - All
2003 VOLKSWAGEN JETTA 1.8L L4 F/I - Turbo
2003 VOLKSWAGEN JETTA 1.9L L4 DSL - Turbo
2003 VOLKSWAGEN JETTA 2.0L L4 F/I - All
2003 VOLKSWAGEN JETTA 2.8L V6 F/I - All
2002 AUDI S3 1.8L L4 F/I - Non-US, Quattro
2002 AUDI TT 1.8L L4 F/I - All
2002 SEAT ALHAMBRA 2.8L V6 F/I - 204BHP, AEH
2002 SEAT CORDOBA 1.9L L4 SDI - 68BHP, AGP
2002 SEAT IBIZA 1.9L L4 SDI - 68BHP, AGP
2002 SEAT LEON 1.6L L4 F/I - 100BHP, AEH, AKL
2002 SEAT LEON 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo AUQ,ARY,APP
2002 SEAT LEON 1.9L L4 DSL - All
2002 SEAT LEON 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2002 SEAT TOLEDO 1.6L L4 F/I - 100BHP, AEH, AKL
2002 SEAT TOLEDO 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo,AUQ
2002 SEAT TOLEDO 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2002 VOLKSWAGEN BEETLE 1.6L L4 F/I - 102BHP, 8V
2002 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
2002 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
2002 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
2002 VOLKSWAGEN BORA 1.8L L4 F/I - 150/180BHP, 20v, Turbo
2002 VOLKSWAGEN BORA 1.9L L4 DSL - All BHP models, Turbo
2002 VOLKSWAGEN BORA 2.0L L4 F/I - 115BHP, OHC
2002 VOLKSWAGEN BORA 2.3L V5 F/I - 170BHP
2002 VOLKSWAGEN BORA 2.8L V6 F/I - 204BHP
2002 VOLKSWAGEN GOLF 1.8L L4 F/I - Turbo
2002 VOLKSWAGEN GOLF 1.9L L4 DSL - All
2002 VOLKSWAGEN GOLF 2.0L L4 F/I - All
2002 VOLKSWAGEN GOLF 2.8L V6 F/I - All
2002 VOLKSWAGEN GOLF 3.2L V6 F/I - 241BHP, R32
2002 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models
2002 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 170BHP
2002 VOLKSWAGEN GTI 1.8L L4 F/I - All
2002 VOLKSWAGEN GTI 1.9L L4 TDI - All
2002 VOLKSWAGEN GTI 2.0L L4 F/I - All
2002 VOLKSWAGEN GTI 2.8L V6 F/I - All
2002 VOLKSWAGEN JETTA 1.8L L4 F/I - Turbo
2002 VOLKSWAGEN JETTA 1.9L L4 DSL - Turbo
2002 VOLKSWAGEN JETTA 2.0L L4 F/I - All
2002 VOLKSWAGEN JETTA 2.8L V6 F/I - All
2001 AUDI TT 1.8L L4 F/I - All
2001 SEAT ALHAMBRA 2.8L V6 F/I - 204BHP, AEH
2001 SEAT ALHAMBRA 2.8L V6 F/I - 204BHP, AEH
2001 SEAT CORDOBA 1.9L L4 SDI - 68BHP, AGP
2001 SEAT IBIZA 1.9L L4 SDI - 68BHP, AGP
2001 SEAT LEON 1.6L L4 F/I - 100BHP, AEH, AKL
2001 SEAT LEON 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo,AUQ,ARY,APP
2001 SEAT LEON 1.9L L4 DSL - All
2001 SEAT LEON 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2001 SEAT TOLEDO 1.6L L4 F/I - 100BHP, AEH, AKL
2001 SEAT TOLEDO 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo,AUQ
2001 SEAT TOLEDO 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2001 VOLKSWAGEN BEETLE 1.6L L4 F/I - 102BHP, 8v
2001 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
2001 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
2001 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
2001 VOLKSWAGEN BORA 1.6L L4 F/I - 100BHP, 20v
2001 VOLKSWAGEN BORA 1.8L L4 F/I - 150BHP, 20v
2001 VOLKSWAGEN BORA 1.9L L4 DSL - All BHP models
2001 VOLKSWAGEN BORA 2.0L L4 F/I - 115BHP, OHC
2001 VOLKSWAGEN BORA 2.3L V5 F/I - 170BHP, DOHC
2001 VOLKSWAGEN BORA 2.8L V6 F/I - 204BHP, DOHC
2001 VOLKSWAGEN GOLF 1.8L L4 F/I - Turbo
2001 VOLKSWAGEN GOLF 1.9L L4 DSL - Turbo
2001 VOLKSWAGEN GOLF 2.0L L4 F/I - All
2001 VOLKSWAGEN GOLF 2.8L V6 F/I - All
2001 VOLKSWAGEN GOLF IV 1.6L L4 F/I - 100BHP, 20v
2001 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models
2001 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 170BHP
2001 VOLKSWAGEN GTI 1.8L L4 F/I - Turbo
2001 VOLKSWAGEN GTI 2.0L L4 F/I - AEG
2001 VOLKSWAGEN GTI 2.8L V6 F/I - AFP
2001 VOLKSWAGEN JETTA 1.8L L4 F/I - Turbo
2001 VOLKSWAGEN JETTA 1.9L L4 DSL - Turbo
2001 VOLKSWAGEN JETTA 2.0L L4 F/I - All
2001 VOLKSWAGEN JETTA 2.8L V6 F/I - All
2000 AUDI TT 1.8L L4 F/I - All
2000 MERCEDES BENZ S430 4.3L V8 F/I - All
2000 SEAT ALHAMBRA 2.8L V6 F/I - 204BHP, AEH
2000 SEAT CORDOBA 1.9L L4 F/I - 68BHP, AGP, SDi
2000 SEAT IBIZA 1.9L L4 SDI - 69BHP, AGP
2000 SEAT LEON 1.6L L4 F/I - 100BHP, AEH, AKL
2000 SEAT LEON 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo AUQ,4WD,AJQ
2000 SEAT LEON 1.9L L4 DSL - All
2000 SEAT LEON 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2000 SEAT TOLEDO 1.6L L4 F/I - 100BHP, AEH, AKL
2000 SEAT TOLEDO 1.8L L4 F/I - 125BHP,20v,AGN,APG;180BHP,Turbo AUQ,4WD,AJQ
2000 SEAT TOLEDO 2.3L V5 F/I - 170BHP, AQN; 150BHP, AGZ
2000 SKODA OCTAVIA 1.8L L4 F/I - All
2000 SKODA OCTAVIA 1.9L L4 SDI - All
2000 SKODA OCTAVIA 1.9L L4 TDI - Turbo
2000 VOLKSWAGEN BEETLE 1.6L L4 F/I - 102BHP, 8v, from 8/00
2000 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
2000 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
2000 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
2000 VOLKSWAGEN BORA 1.6L L4 F/I - 100BHP, 20v, DOHC
2000 VOLKSWAGEN BORA 1.9L L4 DSL - All BHP models
2000 VOLKSWAGEN BORA 2.0L L4 F/I - 115BHP
2000 VOLKSWAGEN BORA 2.3L V5 F/I - 150/170BHP, DOHC
2000 VOLKSWAGEN BORA 2.8L V6 F/I - 204BHP
2000 VOLKSWAGEN GOLF 1.8L L4 F/I - Turbo
2000 VOLKSWAGEN GOLF 1.9L L4 TDI - Turbo
2000 VOLKSWAGEN GOLF 2.0L L4 F/I - All
2000 VOLKSWAGEN GOLF 2.8L V6 F/I - All
2000 VOLKSWAGEN GOLF IV 1.6L L4 F/I - 100BHP, 20v
2000 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models, Turbo 68BHP
2000 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 150/170BHP
2000 VOLKSWAGEN GTI 1.8L L4 F/I - Turbo
2000 VOLKSWAGEN GTI 2.0L L4 F/I - AEG
2000 VOLKSWAGEN GTI 2.8L V6 F/I - AFP
2000 VOLKSWAGEN JETTA 1.8L L4 F/I - Turbo
2000 VOLKSWAGEN JETTA 1.9L L4 DSL - Turbo
2000 VOLKSWAGEN JETTA 2.0L L4 F/I - All
2000 VOLKSWAGEN JETTA 2.8L V6 F/I - All
1999 MERCEDES BENZ S430 4.3L V8 F/I - All
1999 SEAT CORDOBA 1.9L L4 SDI - 68BHP, AGP
1999 SEAT IBIZA 1.9L L4 SDI - 60BHP, AGP
1999 SEAT LEON 1.6L L4 F/I - 100BHP, AEH, AKL
1999 SEAT LEON 1.8L L4 F/I - 125BHP, 20v, AGN, APG; 180BHP, Turbo, APP
1999 SEAT LEON 2.3L V5 F/I - 150BHP, AGZ
1999 SEAT TOLEDO 1.6L L4 F/I - 100BHP, AEH, AKL
1999 SEAT TOLEDO 1.8L L4 F/I - 125BHP, 20v, AGN, APG
1999 SEAT TOLEDO 2.3L V5 F/I - 150BHP, AGZ
1999 SKODA OCTAVIA 1.8L L4 F/I - All
1999 SKODA OCTAVIA 1.9L L4 SDI - All
1999 SKODA OCTAVIA 1.9L L4 TDI - Turbo
1999 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
1999 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
1999 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
1999 VOLKSWAGEN BORA 1.6L L4 F/I - 100BHP, 20v
1999 VOLKSWAGEN BORA 1.9L L4 DSL - All BHP models
1999 VOLKSWAGEN BORA 2.0L L4 F/I - 115BHP, OHC
1999 VOLKSWAGEN BORA 2.3L V5 F/I - 150BHP
1999 VOLKSWAGEN GOLF 1.9L L4 F/I - All
1999 VOLKSWAGEN GOLF 2.0L L4 F/I - AEG, new body style
1999 VOLKSWAGEN GOLF 2.8L V6 F/I - AFP, new body style
1999 VOLKSWAGEN GOLF IV 1.6L L4 F/I - 100BHP, 20v
1999 VOLKSWAGEN GOLF IV 1.8L L4 F/I - 125BHP, 20v
1999 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models
1999 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 150BHP
1999 VOLKSWAGEN GTI 2.0L L4 F/I - AEG
1999 VOLKSWAGEN GTI 2.8L V6 F/I - AFP
1999 VOLKSWAGEN JETTA 1.9L L4 DSL - new body style, Turbo
1999 VOLKSWAGEN JETTA 2.0L L4 F/I - AEG, new body style
1999 VOLKSWAGEN JETTA 2.8L V6 F/I - AFP, new body style
1998 (and later) AUDI TT 1.8L L4 F/I - Turbo
1998 SKODA OCTAVIA 1.8L L4 F/I - All
1998 SKODA OCTAVIA 1.9L L4 SDI - All
1998 SKODA OCTAVIA 1.9L L4 TDI - Turbo
1998 VOLKSWAGEN BEETLE 1.8L L4 F/I - Turbo
1998 VOLKSWAGEN BEETLE 1.9L L4 DSL - Turbo
1998 VOLKSWAGEN BEETLE 1.9L L4 TDI - Turbo
1998 VOLKSWAGEN BEETLE 2.0L L4 F/I - All
1998 VOLKSWAGEN BORA 1.6L L4 F/I - All
1998 VOLKSWAGEN BORA 1.9L L4 TDI - Turbo
1998 VOLKSWAGEN BORA 2.0L L4 F/I - All
1998 VOLKSWAGEN BORA 2.3L V5 F/I - All
1998 VOLKSWAGEN GOLF IV 1.6L L4 F/I - 100BHP, 20v, DOHC
1998 VOLKSWAGEN GOLF IV 1.8L L4 F/I - 125BHP, 20v, DOHC
1998 VOLKSWAGEN GOLF IV 1.9L L4 DSL - All BHP models, Turbo 68BHP, OHC
1998 VOLKSWAGEN GOLF IV 2.3L V5 F/I - 150BHP, DOHC
1997 SKODA OCTAVIA 1.8L L4 F/I - All
1997 SKODA OCTAVIA 1.9L L4 SDI - All
1997 SKODA OCTAVIA 1.9L L4 TDI - Turbo
1997 VOLKSWAGEN GOLF IV 1.6L L4 F/I - All
1997 VOLKSWAGEN GOLF IV 1.8L L4 F/I - 125BHP, 20v, DOHC
1997 VOLKSWAGEN GOLF IV 1.9L L4 DSL - inc.Turbo
1997 VOLKSWAGEN GOLF IV 2.0L L4 F/I - All
1997 VOLKSWAGEN GOLF IV 2.3L V5 F/I - All
1996 (and later) AUDI A3 1.6L L4 F/I - Non-US
1996 (and later) AUDI A3 1.8L L4 F/I - Turbo
1996 (and later) AUDI A3 1.9L L4 TDI - Turbo
Info taken from
K&N website