When doing replacement or upgrading on 1975 – 2018 BMW 530i 530xi xDrive adaptive capsule halogen headlamps HID lighting with without, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight1994 – 1995 9006
1975 – 1978 H5006
High Beam Headlight1994 – 1995 9005
1975 – 1978 H5001
Front Fog Light1994 9006
1995 H1
Back Up Light1975 – 1978, 1994 – 1995 1156
Brake1975 – 1978, 1994 – 1995 1156
Dome Light1975 – 1978 578
Front Side Marker1994 – 1995 12961
1975 – 1978 T4W
Front Turn Signal1975 – 1978, 1994 – 1995 P21/5W
License Plate1975 – 1978, 1994 – 1995 12844
Parking Light1994 – 1995 1157
1975 – 1978 P21/5W
Rear Side Marker1977 12929
1975 – 1976, 1978 T4W
Rear Turn Signal1975 – 1978, 1994 1156
1995 P21W
Tail Light1977 – 1978, 1994 – 1995 12814
1975 – 1976 12821
Center High Mount Stop Light1994 – 1995 1156
Engine Compartment Light1994 – 1995 578
1975 – 1978 DE3423
Glove Box1975 – 1978 12929
1994 – 1995 DE3423
Trunk1994 – 1995 6411
Low Beam Headlight2001 – 2007 H7
High Beam Headlight2001 – 2007 H7
Front Fog Light2004 – 2007 9006
2001 – 2003 H8
Back Up Light2001 – 2003 1156
2004 – 2007 921
Brake2001 – 2007 1156
Dome Light2001 – 2005 578
Front Side Marker2004 – 2005 12961
Front Turn Signal2001 – 2003 3457NA
2004 – 2005 PY21W
License Plate2001 – 2003 12844
2004 – 2007 6418
Parking Light2006 – 2007 12961
2004 – 2005 194
2001 – 2003 H6W
Rear Turn Signal2006 – 2007 PY21W
Tail Light2004 – 2007 1156
Front Inner Turn Signal2006 – 2007 PY21W
Front Outer Turn Signal2006 – 2007 12396NA
Center High Mount Stop Light2001 – 2003 1156
Glove Box2001 – 2007 DE3423
Interior Door2006 – 2007 194
Stepwell2001 – 2007 12844
Trunk2001 – 2007 6411
Low Beam Headlight2006 – 2007 D1S
2001 – 2005 D2S
High Beam Headlight2001 – 2007 H7
Front Fog Light2004 – 2007 9006
2001 – 2003 H8
Back Up Light2001 – 2003 1156
2004 – 2007 921
Brake2001 – 2007 1156
Dome Light2001 – 2005 6411
Front Side Marker2004 – 2005 12961
Front Turn Signal2001 3357NA
2002 – 2003 3457NA
2004 – 2005 PY21W
License Plate2001 – 2003 12844
2004 – 2007 6418
Parking Light2004 – 2005 194
2001 – 2003 H6W
Rear Turn Signal2006 – 2007 PY21W
Tail Light2004 – 2007 1156
Front Inner Turn Signal2006 – 2007 PY21W
Front Outer Turn Signal2006 – 2007 12396NA
Center High Mount Stop Light2001 – 2003 1156
Glove Box2001 – 2007 DE3423
Interior Door2006 – 2007 194
Stepwell2001 – 2007 12844
Trunk2001 – 2007 6411
Front Turn Signal2017 – 2018 PY21W
Front Turn Signal2017 – 2018 PY21W
Low Beam Headlight2006 – 2007 H7
High Beam Headlight2006 – 2007 H7
Front Fog Light2006 – 2007 9006
Back Up Light2006 – 2007 921
Brake2006 – 2007 1156
License Plate2006 – 2007 6418
Parking Light2006 – 2007 12961
Rear Turn Signal2006 – 2007 PY21W
Tail Light2006 – 2007 1156
Front Inner Turn Signal2006 – 2007 PY21W
Front Outer Turn Signal2006 – 2007 12396NA
Glove Box2006 – 2007 DE3423
Interior Door2006 – 2007 194
Stepwell2006 – 2007 12844
Trunk2006 – 2007 6411
Low Beam Headlight2006 – 2007 D1S
High Beam Headlight2006 – 2007 H7
Front Fog Light2006 – 2007 9006
Back Up Light2006 – 2007 921
Brake2006 – 2007 1156
License Plate2006 – 2007 6418
Rear Turn Signal2006 – 2007 PY21W
Tail Light2006 – 2007 1156
Front Inner Turn Signal2006 – 2007 PY21W
Front Outer Turn Signal2006 – 2007 12396NA
Glove Box2006 – 2007 DE3423
Interior Door2006 – 2007 194
Stepwell2006 – 2007 12844
Trunk2006 – 2007 6411