When doing replacement or upgrading on 1996 – 2016 BMW Z3 Z4 Z8 Coupe M Roadster Adaptive 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.

Low Beam Headlight1996 – 1998 9006
High Beam Headlight1996 – 1998 9005
Front Fog Light1996 – 1998 H7
Back Up Light1996 – 1998 1156
Brake1996 – 1998 1156
Dome Light1996 – 1998 6411
Front Side Marker1996 – 1998 12821
License Plate1996 – 1998 12961
Parking Light1996 – 1998 12821
Rear Side Marker1996 – 1998 12821
Rear Turn Signal1996 – 1998 1156
Tail Light1996 – 1998 12821
Front Inner Turn Signal1996 – 1998 P21W
Front Outer Turn Signal1996 – 1998 12821
Center High Mount Stop Light1996 – 1998 194
Trunk1996 – 1998 DE3423
Low Beam Headlight1999 – 2002 9006
High Beam Headlight1999 – 2002 9005
Front Fog Light1999 – 2002 H7
Back Up Light1999 – 2002 1156
Brake1999 – 2002 1156
Dome Light1999 – 2002 6411
Front Side Marker1999 12821
2000 – 2001 2357
2002 2357NA
Front Turn Signal2000 – 2002 2357NA
License Plate1999 – 2002 12961
Parking Light1999 1157
2000 – 2002 2357
Rear Side Marker1999 – 2001 1157
2002 12821
Rear Turn Signal1999 1156
2002 3457
2000 – 2001 PY21W
Tail Light1999 – 2002 12821
Front Inner Turn Signal1999 1157
Front Outer Turn Signal1999 12821
Center High Mount Stop Light1999 – 2001 194
Trunk1999 – 2002 DE3423
Low Beam Headlight1999 – 2002 9006
High Beam Headlight1999 – 2002 9005
Front Fog Light1999 – 2002 H7
Back Up Light1999 – 2002 1156
Brake1999 – 2002 1156
Dome Light1999 – 2002 6411
Front Side Marker1999 12821
2000 – 2001 2357
2002 2357NA
Front Turn Signal2000 – 2002 2357NA
License Plate1999 – 2002 12961
Parking Light1999 1157
2000 – 2002 2357
Rear Side Marker1999 – 2001 1157
2002 12821
Rear Turn Signal1999 1156
2002 3457
2000 – 2001 PY21W
Tail Light1999 – 2002 12821
Front Inner Turn Signal1999 1157
Front Outer Turn Signal1999 12821
Center High Mount Stop Light1999 – 2001 194
Trunk1999 – 2002 DE3423
Low Beam Headlight2002 9006
High Beam Headlight2002 9005
Front Fog Light2002 H7
Back Up Light2002 1156
Brake2002 1156
Front Side Marker2002 2357NA
Front Turn Signal2002 2357NA
License Plate2002 12961
Parking Light2002 2357
Rear Side Marker2002 12821
Rear Turn Signal2002 3457
Tail Light2002 12821
Trunk2002 6411
Low Beam Headlight2002 9006
High Beam Headlight2002 9005
Front Fog Light2002 H7
Back Up Light2002 1156
Brake2002 1156
Front Side Marker2002 2357NA
Front Turn Signal2002 2357NA
License Plate2002 12961
Parking Light2002 2357
Rear Side Marker2002 12821
Rear Turn Signal2002 3457
Tail Light2002 12821
Trunk2002 6411
Low Beam Headlight2003 – 2008 H7
High Beam Headlight2003 – 2008 H7
Front Fog Light2003 – 2004 H11
2005 – 2008 H8/H11/H16
Back Up Light2003 – 2006 1156
2007 – 2008 921
Brake2007 – 2008 1157
2003 – 2006 P21/4W
Dome Light2003 – 2008 DE3423
Front Side Marker2005 – 2008 12396NA
2003 – 2004 12961
Front Turn Signal2005 – 2008 H21W
2003 – 2004 P21W
License Plate2003 – 2008 12961
Parking Light2005 – 2006 12396NA
2003 – 2004, 2007 – 2008 12961
Rear Turn Signal2003 – 2004 1156
2005 – 2008 PY21W
Tail Light2007 – 2008 1157
2003 – 2006 P21/4W
Map Light2003 – 2008 12961
Stepwell2003 – 2008 12961
Trunk2003 – 2008 6411
Low Beam Headlight2003 – 2008 D2S
High Beam Headlight2003 – 2008 H7
Front Fog Light2003 – 2004 H11
2005 – 2008 H8/H11/H16
Back Up Light2003 – 2006 1156
2007 – 2008 921
Brake2007 – 2008 1157
2003 – 2006 P21/4W
Dome Light2003 – 2008 DE3423
Front Side Marker2005 – 2008 12396NA
2003 – 2004 12961
Front Turn Signal2005 – 2008 H21W
2003 – 2004 P21W
License Plate2003 – 2008 12961
Parking Light2005 – 2006 12396NA
2004, 2007 – 2008 12961
2003 194
Rear Turn Signal2003 – 2004 1156
2005 – 2008 PY21W
Tail Light2007 – 2008 1157
2003 – 2006 P21/4W
Map Light2003 – 2008 12961
Stepwell2003 – 2008 12961
Trunk2003 – 2008 6411
High Beam Headlight2007 – 2008 H7
High Beam and Low Beam Headlight2009 – 2016 D1S
Front Fog Light2007 – 2008 H8/H11/H16
Back Up Light2007 – 2016 921
Brake2007 – 2008 1157
2009 – 2016 921
Daytime Running Light2009 – 2013 H8
Dome Light2007 – 2008 DE3423
Front Side Marker2007 – 2008 12396NA
Front Turn Signal2007 – 2008 H21W
2009 – 2016 PY24NA
License Plate2007 – 2008 12961
Parking Light2007 – 2008 12961
Rear Turn Signal2007 – 2008 PY21W
Tail Light2007 – 2008 1157
Glove Box2009 – 2016 6418
Interior Door2009 – 2016 194
Map Light2007 – 2008 12961
Stepwell2007 – 2016 12961
Trunk2009 – 2016 194
2007 – 2008 6411
Low Beam Headlight2000 – 2003 D2S
High Beam Headlight2000 – 2003 9011
Back Up Light2000 – 2003 1156
License Plate2000 – 2003 194
Parking Light2000 – 2003 H6W
Courtesy2000 – 2003 6418
Engine Compartment Light2000 – 2003 578
Interior Door2000 – 2003 194