When doing replacement or upgrading on 1992 – 2018 Audi S4 S3 S5 S6 S7 S8 Avant Base Cabriolet capsule halogen headlamps HID with, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

High Beam and Low Beam Headlight 2015 – 2016 D3S
Back Up Light 2015 – 2016 H6W
Dome Light 2015 – 2016 194
Front Turn Signal 2015 – 2016 PWY24WNAHTR
Glove Box 2015 – 2016 12961
Interior Door 2015 – 2016 194
Rear Fog Light 2015 – 2016 H21W
Trunk 2015 – 2016 12961
Dome Light 2017 – 2018 194
Glove Box 2017 – 2018 12961
Interior Door 2017 – 2018 194
Map Light 2017 – 2018 12961
Trunk 2017 – 2018 194
Low Beam Headlight 2000 D2S
High Beam Headlight 2000 H7
High Beam and Low Beam Headlight 2007 – 2008 D1S
Front Fog Light 2000 H7
2007 – 2008 H8/H11/H16
Back Up Light 2000, 2007 – 2008 1156
Brake 2007 – 2008 1156
2000 1157
Daytime Running Light 2007 – 2008 1156
Dome Light 2007 – 2008 578
2000 6411
Front Side Marker 2007 – 2008 12961
2000 3457
Front Turn Signal 2007 – 2008 P21W
License Plate 2007 – 2008 12844
2000 6418
Parking Light 2007 – 2008 194
2000 H6W
Rear Side Marker 2000 12961
Rear Turn Signal 2000, 2007 – 2008 1156
Tail Light 2000 1157
2007 – 2008 12821
Front Inner Turn Signal 2000 3457NA
Front Outer Turn Signal 2000 12396NA
Center High Mount Stop Light 2000 12505
Courtesy 2007 – 2008 12961
Engine Compartment Light 2000, 2007 – 2008 578
Glove Box 2007 – 2008 12961
2000 DE3423
Interior Door 2000 194
Stepwell 2000 12961
Trunk 2000, 2007 – 2008 DE3423
Low Beam Headlight 1992 – 1994 9006
High Beam Headlight 1992 – 1994 9005
High Beam and Low Beam Headlight 2009 – 2016 D3S
Front Fog Light 1992 – 1994 H3-55W
2013 – 2016 H8
2009 – 2012 H8/H11/H16
Back Up Light 1992 – 1994 1156
2009 – 2016 921
Brake 2009 – 2011 1156
1992 – 1994 1157
Dome Light 2013 – 2016 6411
Front Side Marker 2009 – 2012 12961
Front Turn Signal 1992 – 1994 1157
2009 – 2012 HPC24NA
2013 – 2016 PWY24WNAHTR
License Plate 2009 – 2012 12844
1992 – 1994 T4W
Parking Light 1992 – 1994 1157
Rear Turn Signal 2009 – 2012 1156
1992 – 1994 1157
Tail Light 2009 – 2011 1156
1992 – 1994 12821
Center High Mount Stop Light 1992 – 1994 194
Glove Box 2018 12256
2009 – 2012 12961
2013 – 2016 194
Interior Door 2009 – 2016 194
Map Light 2009 – 2016 12961
Trunk 2009 – 2016 194
Low Beam Headlight 2000, 2007 – 2008 H7
High Beam Headlight 2000, 2007 – 2008 H7
Front Fog Light 2000 H7
2007 – 2008 H8/H11/H16
Back Up Light 2000, 2007 – 2008 1156
Brake 2007 – 2008 1156
2000 1157
Daytime Running Light 2007 – 2008 1156
Dome Light 2007 – 2008 578
2000 6411
Front Side Marker 2007 – 2008 12961
2000 3457
Front Turn Signal 2007 – 2008 P21W
License Plate 2007 – 2008 12844
2000 6418
Parking Light 2007 – 2008 194
2000 H6W
Rear Side Marker 2000 12961
Rear Turn Signal 2000, 2007 – 2008 1156
Tail Light 2000 1157
2007 – 2008 12821
Front Inner Turn Signal 2000 3457NA
Front Outer Turn Signal 2000 12396NA
Center High Mount Stop Light 2000 12505
Courtesy 2007 – 2008 12961
Engine Compartment Light 2000, 2007 – 2008 578
Glove Box 2007 – 2008 12961
2000 DE3423
Interior Door 2000 194
Stepwell 2000 12961
Trunk 2000, 2007 – 2008 DE3423
Low Beam Headlight 2004 – 2006 D1S
2001 – 2002 D2S
High Beam Headlight 2001 – 2002, 2004 – 2006 H7
Front Fog Light 2001 H7
2002, 2004 – 2006 H8/H11/H16
Back Up Light 2001 – 2002, 2004 – 2006 1156
Brake 2005 – 2006 1156
2001 – 2002, 2004 1157
Dome Light 2004 578
2001 – 2002 6411
Front Side Marker 2001 – 2002, 2004 – 2006 3457
License Plate 2001 – 2002, 2004 – 2006 6418
Parking Light 2002, 2004 12961
2005 – 2006 3457NA
2001 H6W
Rear Side Marker 2004 12821
2001 12961
2002 P21/5W
Rear Turn Signal 2001 1156
2002, 2004 – 2006 PY21W
Tail Light 2001 – 2002 1157
2005 – 2006 12821
2004 P21/4W
Front Inner Turn Signal 2001 – 2002, 2004 – 2006 3457NA
Front Outer Turn Signal 2001 – 2002, 2004 – 2006 12396NA
Center High Mount Stop Light 2001 12505
Courtesy 2002 12961
Engine Compartment Light 2001 – 2002, 2004 578
Glove Box 2004 – 2006 12961
2001 – 2002 DE3423
Interior Door 2001, 2004 – 2006 194
Stepwell 2001, 2004 – 2006 12961
Trunk 2002, 2005 – 2006 194
2001, 2004 DE3423
Low Beam Headlight 2001 – 2002, 2004 – 2006 H7
High Beam Headlight 2001 – 2002, 2004 – 2006 H7
Front Fog Light 2001 H7
2002, 2004 – 2006 H8/H11/H16
Back Up Light 2001 – 2002, 2004 – 2006 1156
Brake 2005 – 2006 1156
2001 – 2002, 2004 1157
Daytime Running Light 2005 – 2006 1156
Dome Light 2002, 2004 578
2001 6411
Front Side Marker 2001 – 2002, 2004 – 2006 3457
License Plate 2001 – 2002, 2004 – 2006 6418
Parking Light 2002, 2004 12961
2005 – 2006 3457NA
2001 H6W
Rear Side Marker 2004 12821
2001 12961
2002 P21/5W
Rear Turn Signal 2001 1156
2002, 2004 – 2006 PY21W
Tail Light 2001 – 2002 1157
2005 – 2006 12821
2004 P21/4W
Front Inner Turn Signal 2001 – 2002, 2004 – 2006 3457NA
Front Outer Turn Signal 2001 – 2002, 2004 – 2006 12396NA
Center High Mount Stop Light 2001 12505
Courtesy 2002 12961
Engine Compartment Light 2001 – 2002, 2004 578
Glove Box 2004 – 2006 12961
2001 – 2002 DE3423
Interior Door 2001, 2004 – 2006 194
Stepwell 2001, 2004 – 2006 12961
Trunk 2002, 2005 – 2006 194
2001, 2004 DE3423
Low Beam Headlight 2004 – 2006 D1S
2001 – 2002 D2S
High Beam Headlight 2001 – 2002, 2004 – 2006 H7
Front Fog Light 2001 H7
2002, 2004 – 2006 H8/H11/H16
Back Up Light 2001 – 2002, 2004 – 2006 1156
Brake 2001 – 2002, 2004 – 2006 1157
Dome Light 2004 – 2006 578
2001 – 2002 6411
Front Side Marker 2001 – 2002, 2004 – 2006 3457
License Plate 2001 – 2002, 2004 – 2006 6418
Parking Light 2002 12961
2004 – 2006 3457
2001 H6W
Rear Side Marker 2001 – 2002, 2004 – 2006 P21/5W
Rear Turn Signal 2002 1156
2001 1157
2004 – 2006 PY21W
Tail Light 2001 – 2002, 2004 – 2006 1157
Front Inner Turn Signal 2001 – 2002, 2004 – 2006 3457NA
Front Outer Turn Signal 2001 – 2002, 2004 – 2006 12396NA
Luggage Compartment 2002 12961
2004 – 2006 6418
Center High Mount Stop Light 2001 70
Courtesy 2002 12961
Engine Compartment Light 2001 – 2002, 2004 – 2006 578
Glove Box 2004 – 2006 12961
2001 – 2002 DE3423
Interior Door 2001, 2004 – 2006 194
Stepwell 2001, 2004 – 2006 12961
Low Beam Headlight 2001 – 2002, 2004 – 2006 H7
High Beam Headlight 2001 – 2002, 2004 – 2006 H7
Front Fog Light 2001 H7
2002, 2004 – 2006 H8/H11/H16
Back Up Light 2001 – 2002, 2004 – 2006 1156
Brake 2001 – 2002, 2004 – 2006 1157
Daytime Running Light 2004 – 2006 1156
Dome Light 2002, 2004 – 2006 578
2001 6411
Front Side Marker 2001 – 2002, 2004 – 2006 3457
License Plate 2001 – 2002, 2004 – 2006 6418
Parking Light 2002 12961
2004 – 2006 3457
2001 H6W
Rear Side Marker 2004 1157
2001 – 2002, 2005 – 2006 P21/5W
Rear Turn Signal 2002 1156
2001 1157
2004 – 2006 PY21W
Tail Light 2001 – 2002, 2004 – 2006 1157
Front Inner Turn Signal 2001 – 2002, 2004 – 2006 3457NA
Front Outer Turn Signal 2001 – 2002, 2004 – 2006 12396NA
Luggage Compartment 2002 12961
2004 – 2006 6418
Center High Mount Stop Light 2001 70
Courtesy 2002 12961
Engine Compartment Light 2001 – 2002, 2004 – 2006 578
Glove Box 2004 – 2006 12961
2001 – 2002 DE3423
Interior Door 2001, 2004 – 2006 194
Stepwell 2001, 2004 – 2006 12961
Low Beam Headlight 2004 – 2006 D2S
High Beam Headlight 2004 – 2006 H7
Front Fog Light 2004 – 2006 H11
Back Up Light 2004 – 2006 1156
Brake 2004 – 2006 P21/4W
Front Side Marker 2004 – 2006 3457
License Plate 2004 – 2006 6418
Parking Light 2004 3357NA
2005 – 2006 3457
Rear Side Marker 2004 – 2006 12821
Rear Turn Signal 2004 – 2006 PY21W
Tail Light 2004 – 2006 P21/4W
Front Inner Turn Signal 2004 – 2006 3357NA
Front Outer Turn Signal 2004 – 2006 12396NA
Glove Box 2004 – 2006 12961
Interior Door 2004 – 2006 194
Stepwell 2004 – 2006 12961
Trunk 2004 – 2006 194
Low Beam Headlight 2004 – 2006 H7
High Beam Headlight 2004 – 2006 H9
Front Fog Light 2004 – 2006 H11
Back Up Light 2004 – 2006 1156
Brake 2004 – 2006 P21/4W
Front Side Marker 2004 – 2006 3457
License Plate 2004 – 2006 6418
Parking Light 2004 – 2006 3357NA
Rear Side Marker 2004 – 2006 12821
Rear Turn Signal 2004 – 2006 PY21W
Tail Light 2004 – 2006 P21/4W
Front Inner Turn Signal 2004 – 2006 3357NA
Front Outer Turn Signal 2004 – 2006 12396NA
Glove Box 2004 – 2006 12961
Interior Door 2004 – 2006 194
Stepwell 2004 – 2006 12961
Trunk 2004 – 2006 194
High Beam and Low Beam Headlight 2008 – 2018 D3S
Front Fog Light 2013 – 2018 H8
2008 – 2012 H8/H11/H16
Back Up Light 2008 – 2018 921
Brake 2008 – 2011 1156
Dome Light 2018 578
2013 – 2017 6411
2008 – 2012 DE3423
Front Side Marker 2008 – 2012 12961
Front Turn Signal 2008 – 2012 H21W
2013 – 2018 PWY24WNAHTR
License Plate 2008 – 2012 12844
Parking Light 2008 – 2012 12961
Rear Turn Signal 2008 – 2012 921
Tail Light 2008 – 2011 1156
Courtesy 2008 – 2012 12961
Glove Box 2008 – 2012, 2018 12961
2013 – 2017 194
Interior Door 2013 – 2018 194
Map Light 2008 – 2018 12961
Rear Reading Light 2013 – 2017 12961
2018 194
Trunk 2013 – 2017 12961
2008 – 2012, 2018 194
High Beam and Low Beam Headlight 2007 – 2008 D2S
2013 – 2014 D3S
Front Fog Light 2007 – 2008 H7
2013 – 2014 H8/H11/H16
Back Up Light 2007 – 2008, 2013 – 2014 921
Brake 2007 – 2008 1156
Daytime Running Light 2007 – 2008 1156
Dome Light 2013 – 2014 6411
Front Side Marker 2007 – 2008 12396NA
Front Turn Signal 2013 – 2014 PSY24NA
License Plate 2007 – 2008 12844
Parking Light 2007 – 2008 3357NA
Rear Turn Signal 2007 – 2008, 2013 – 2014 PY21W
Tail Light 2007 – 2008 1156
Front Inner Turn Signal 2007 – 2008 3357NA
Front Outer Turn Signal 2007 – 2008 12396NA
Courtesy 2007 – 2008 12256
Glove Box 2007 – 2008 12961
2013 – 2014 194
Interior Door 2007 – 2008 12961
2013 – 2014 194
Stepwell 2007 – 2008 12961
Trunk 2007 – 2008, 2013 – 2014 194
Low Beam Headlight 1995 – 1996 9006
1997 H1
High Beam Headlight 1995 – 1997 9005
High Beam and Low Beam Headlight 2009 – 2011 D2S
Front Fog Light 2015 H11
1995 – 1997 H3-55W
2009 – 2011 H7
Back Up Light 1995 – 1997 1156
2009 – 2011, 2015 921
Brake 1995 – 1997 1157
2009 – 2011 PR21W
Dome Light 2015 – 2016 6411
1997 DE3423
Front Side Marker 2009 – 2011 12396NA
1995 – 1997 P21/5W
Front Turn Signal 1995 – 1997 P21/5W
2009 – 2011 PY21W
License Plate 2009 – 2011 12844
1995 – 1997 T4W
Parking Light 1995 – 1997 1157
Rear Side Marker 1995 – 1997 1157
Rear Turn Signal 1995 – 1997 1156
2009 – 2011 PY21W
Tail Light 1995 – 1997 1157
Center High Mount Stop Light 1995 – 1997 70
Engine Compartment Light 1997 578
Glove Box 1997 12929
2009 – 2011 12961
2015 – 2018 194
Interior Door 2009 – 2011 12256
2015 – 2018 194
Rear Fog Light 2015 H21W
Stepwell 2009 – 2011 12961
Trunk 2009 – 2011, 2015 – 2016 194
1997 DE3423
Low Beam Headlight 2007 – 2008 H7
High Beam Headlight 2007 – 2008 H1
Front Fog Light 2007 – 2008 H7
Back Up Light 2007 – 2008 921
Brake 2007 – 2008 1156
Daytime Running Light 2007 – 2008 1156
Front Side Marker 2007 – 2008 12396NA
License Plate 2007 – 2008 12844
Parking Light 2007 – 2008 3357NA
Rear Turn Signal 2007 – 2008 PY21W
Tail Light 2007 – 2008 1156
Front Inner Turn Signal 2007 – 2008 3357NA
Front Outer Turn Signal 2007 – 2008 12396NA
Courtesy 2007 – 2008 12256
Glove Box 2007 – 2008 12961
Interior Door 2007 – 2008 12961
Stepwell 2007 – 2008 12961
Trunk 2007 – 2008 194
Low Beam Headlight 2002 – 2003 D2S
High Beam Headlight 2002 – 2003 H7
Front Fog Light 2002 – 2003 H3-55W
Back Up Light 2002 – 2003 1156
Brake 2002 – 2003 1157
Dome Light 2002 – 2003 6411
Front Side Marker 2002 – 2003 3457
License Plate 2002 – 2003 6418
Parking Light 2002 – 2003 12961
Rear Side Marker 2002 – 2003 1157
Rear Turn Signal 2002 – 2003 1156
Tail Light 2002 – 2003 1157
Front Inner Turn Signal 2002 – 2003 3457NA
Front Outer Turn Signal 2002 – 2003 12396NA
Center High Mount Stop Light 2002 – 2003 12505
Engine Compartment Light 2002 – 2003 578
Glove Box 2002 – 2003 DE3423
Interior Door 2002 – 2003 194
Stepwell 2002 – 2003 12844
Low Beam Headlight 2002 – 2003 H7
High Beam Headlight 2002 – 2003 H1
Front Fog Light 2002 – 2003 H3-55W
Back Up Light 2002 – 2003 1156
Brake 2002 – 2003 1157
Dome Light 2002 – 2003 578
Front Side Marker 2002 – 2003 3457
License Plate 2002 – 2003 6418
Parking Light 2002 – 2003 12961
Rear Side Marker 2002 – 2003 1157
Rear Turn Signal 2002 – 2003 1156
Tail Light 2002 – 2003 1157
Front Inner Turn Signal 2002 – 2003 3457NA
Front Outer Turn Signal 2002 – 2003 12396NA
Center High Mount Stop Light 2002 – 2003 12505
Engine Compartment Light 2002 – 2003 578
Glove Box 2002 – 2003 DE3423
Interior Door 2002 – 2003 194
Stepwell 2002 – 2003 DE3423
High Beam and Low Beam Headlight 2013 – 2014 D3S
Back Up Light 2013 – 2014 PW16WHTR
Dome Light 2013 – 2014 6411
Front Side Marker 2013 – 2014 194
Front Turn Signal 2013 – 2014 PY24WSV
Rear Side Marker 2013 – 2014 12961
Glove Box 2013 – 2014 194
Interior Door 2013 – 2014 194
Trunk 2013 – 2014 194
Back Up Light 2015 PW16WHTR
Dome Light 2015 – 2016 6411
Front Side Marker 2016 12396NA
2015, 2017 – 2018 194
Rear Side Marker 2015 – 2018 12961
Glove Box 2017 – 2018 12961
2015 – 2016 194
Interior Door 2015 – 2018 194
Trunk 2015 – 2016 194
Low Beam Headlight 2001 – 2003 D2S
High Beam Headlight 2001 – 2003 H7
Front Fog Light 2001 – 2003 H3-55W
Back Up Light 2001 – 2003 1156
Brake 2001 – 2003 1157
Dome Light 2001 – 2003 6411
Front Side Marker 2001 – 2003 2357NA
License Plate 2001 – 2003 12844
Parking Light 2001 – 2003 12961
Rear Side Marker 2003 12821
2001 – 2002 12961
Rear Turn Signal 2001 – 2003 1156
Front Inner Turn Signal 2001 – 2003 2357
Front Outer Turn Signal 2001 – 2003 12396NA
Center High Mount Stop Light 2001 – 2003 194
Courtesy 2001 – 2003 12961
Glove Box 2001 – 2003 12929
Inner Tail Light 2001 – 2003 12821
Interior Door 2001 – 2003 DE3423
Outer Tail Light 2001 – 2003 1157
Stepwell 2001 – 2003 6418
Trunk 2001 – 2003 DE3423
Low Beam Headlight 2007 – 2008 D2S
High Beam Headlight 2007 – 2008 H7
High Beam and Low Beam Headlight 2009 D2S
Front Fog Light 2007 – 2008 H7
2009 H8/H11/H16
Back Up Light 2007 – 2008 921
2009 HPC16W
2013 PW16WHTR
Daytime Running Light 2007 – 2009 1156
Dome Light 2007 – 2009 H6W
Front Turn Signal 2009 PSY24NA
2007 – 2008 PSY24WSV
License Plate 2009 12844
2007 – 2008 6418
Parking Light 2007 – 2009 12961
Glove Box 2007 – 2009 12961
2013 – 2018 194
Interior Door 2007 – 2008, 2014 – 2018 194
Map Light 2009 H6W
Stepwell 2007 – 2009 12961
Trunk 2007 – 2009, 2013 194
Low Beam Headlight 2001 – 2003 H1
High Beam Headlight 2001 – 2003 H7
Front Fog Light 2001 – 2003 H3-55W
Back Up Light 2001 – 2003 1156
Brake 2001 – 2003 1157
Dome Light 2001 – 2003 578
Front Side Marker 2001 – 2003 2357
License Plate 2001 – 2003 12844
Parking Light 2001 – 2003 12961
Rear Side Marker 2003 12821
2001 – 2002 12961
Rear Turn Signal 2002 – 2003 1156
2001 P21W
Front Inner Turn Signal 2001 – 2003 2357
Front Outer Turn Signal 2001 – 2003 12396NA
Center High Mount Stop Light 2001 – 2003 194
Courtesy 2001 – 2003 12961
Glove Box 2001 – 2003 12929
Inner Tail Light 2001 – 2003 12821
Interior Door 2001 – 2003 DE3423
Outer Tail Light 2001 – 2003 1157
Stepwell 2001 – 2003 6418
Trunk 2001 – 2003 DE3423