When doing replacement or upgrading on 2001 – 2018 BMW 330i 330Ci 330e 330xi GT xDrive 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 Headlight 2001 – 2006 H7
High Beam Headlight 2001 – 2006 H7
Front Fog Light 2001 – 2006 9006
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Dome Light 2004 – 2006 194
2001 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2004 – 2006 1156
Tail Light 2001 – 2006 P21/4W
Front Inner Turn Signal 2001 1156
Front Outer Turn Signal 2001 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Map Light 2004 – 2006 12961
Stepwell 2001 DE3423
Trunk 2001 – 2006 6411
Low Beam Headlight 2001 D2S
High Beam Headlight 2001 H7
High Beam and Low Beam Headlight 2002 – 2006 D2S
Front Fog Light 2001 – 2006 9006
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Daytime Running Light 2002 – 2006 H7
Dome Light 2004 – 2006 194
2001 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2004 – 2006 1156
Tail Light 2001 – 2006 P21/4W
Front Inner Turn Signal 2001 P21W
Front Outer Turn Signal 2001 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Map Light 2004 – 2006 12961
Stepwell 2001 DE3423
Trunk 2001 – 2006 6411
Low Beam Headlight 2016 – 2018 H7
High Beam Headlight 2016 – 2018 H7
Front Fog Light 2016 – 2018 H8
Dome Light 2016 – 2018 194
Front Turn Signal 2016 – 2018 3457NA
Parking Light 2016 – 2018 3457
Brake 2016 – 2018 H21W
Dome Light 2016 – 2018 12961
Low Beam Headlight 2001 – 2006, 2017 – 2018 H7
High Beam Headlight 2001 – 2006, 2017 – 2018 H7
Front Fog Light 2001 9006
2017 – 2018 H8
2002 – 2006 H8/H11/H16
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Dome Light 2017 – 2018 194
2001, 2004 – 2006 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
Front Turn Signal 2017 – 2018 3457NA
2002 – 2003 P21W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
2017 – 2018 3457
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2006 1156
2004 – 2005 P21W
Tail Light 2004 – 2006 1156
2001 – 2003 P21/4W
Front Inner Turn Signal 2001 1156
2004 – 2006 PY21W
Front Outer Turn Signal 2001, 2004 – 2006 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Interior Door 2004 – 2006 194
Map Light 2004 – 2006 12961
Rear Reading Light 2004 – 2006 194
Stepwell 2004 – 2006 12961
2001 DE3423
Trunk 2001 – 2006 6411
Low Beam Headlight 2001 D2S
High Beam Headlight 2001 H7
High Beam and Low Beam Headlight 2002 – 2006 D2S
Front Fog Light 2001 9006
2002 – 2006 H11
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Daytime Running Light 2002 – 2006 H7
Dome Light 2001, 2004 – 2006 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
Front Turn Signal 2002 – 2003 P21W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2004 – 2006 1156
Tail Light 2004 – 2006 1156
2001 – 2003 P21/4W
Front Inner Turn Signal 2001 P21W
2004 – 2006 PY21W
Front Outer Turn Signal 2001, 2004 – 2006 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Interior Door 2004 – 2006 194
Map Light 2004 – 2006 12961
Rear Reading Light 2004 – 2006 194
Stepwell 2004 – 2006 12961
2001 DE3423
Trunk 2001 – 2006 6411
Brake 2017 – 2018 H21W
Dome Light 2017 – 2018 12961
Brake 2017 – 2018 H21W
Glove Box 2017 – 2018 12961
Interior Door 2017 – 2018 194
Stepwell 2017 – 2018 12961
Low Beam Headlight 2017 – 2018 H7
High Beam Headlight 2017 – 2018 H7
Front Fog Light 2017 – 2018 H8
Dome Light 2017 – 2018 194
Front Turn Signal 2017 – 2018 3457NA
Parking Light 2017 – 2018 3457
Brake 2017 – 2018 H21W
Dome Light 2017 – 2018 12961
Low Beam Headlight 2001 – 2006 H7
High Beam Headlight 2001 – 2006 H7
Front Fog Light 2001 9006
2002 – 2006 H8/H11/H16
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Dome Light 2001, 2004 – 2006 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
Front Turn Signal 2002 – 2003 P21W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2005 – 2006 1156
2004 P21W
Tail Light 2004 – 2006 1156
2001 – 2003 P21/4W
Front Inner Turn Signal 2001 1156
2004 – 2006 PY21W
Front Outer Turn Signal 2001, 2004 – 2006 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Interior Door 2004 – 2006 194
Map Light 2004 – 2006 12961
Rear Reading Light 2004 – 2006 194
Stepwell 2004 – 2006 12961
2001 DE3423
Trunk 2001 – 2006 6411
Low Beam Headlight 2001 D2S
High Beam Headlight 2001 H7
High Beam and Low Beam Headlight 2002 – 2006 D2S
Front Fog Light 2001 9006
2002 – 2006 H11
Back Up Light 2001 – 2006 1156
Brake 2001 – 2006 1156
Daytime Running Light 2002 – 2006 H7
Dome Light 2001, 2004 – 2006 DE3423
Front Side Marker 2002 – 2006 12961
2001 P21/5W
Front Turn Signal 2002 – 2003 P21W
License Plate 2001 – 2006 12844
Parking Light 2001 12961
2002 – 2006 194
Rear Side Marker 2001 – 2003 P21/4W
Rear Turn Signal 2004, 2006 1156
2005 P21W
Tail Light 2004 – 2006 1156
2001 – 2003 P21/4W
Front Inner Turn Signal 2001 P21W
2004 – 2006 PY21W
Front Outer Turn Signal 2001, 2004 – 2006 12961
Courtesy 2002 – 2006 6418
Glove Box 2001 – 2006 DE3423
Interior Door 2004 – 2006 194
Map Light 2004 – 2006 12961
Rear Reading Light 2004 – 2006 194
Stepwell 2004 – 2006 12961
2001 DE3423
Trunk 2001 – 2006 6411