When doing replacement or upgrading on 2008 – 2013 BMW 135i 135is 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 2008 – 2013 H7
High Beam Headlight 2008 – 2013 H7
Front Fog Light 2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light 2008 – 2013 921
Brake 2008 – 2013 1156
Dome Light 2008 – 2013 194
Front Turn Signal 2008 – 2013 PY21W
Parking Light 2008 – 2013 12961
Rear Turn Signal 2008 – 2013 PY21W
Courtesy 2008 – 2013 12961
Glove Box 2008 – 2013 DE3423
Map Light 2008 – 2013 12961
Trunk 2008 – 2013 6411
Front Fog Light 2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light 2008 – 2013 921
Brake 2008 – 2013 1156
Dome Light 2008 – 2013 194
Rear Turn Signal 2008 – 2013 PY21W
Courtesy 2008 – 2013 12961
Glove Box 2008 – 2013 6418
Map Light 2008 – 2013 12961
Trunk 2008 – 2013 6411
High Beam and Low Beam Headlight 2008 – 2013 D1S
Front Fog Light 2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light 2008 – 2013 921
Brake 2008 – 2013 1156
Daytime Running Light 2008 – 2013 H8
Dome Light 2008 – 2013 194
Front Turn Signal 2008 – 2013 PY21W
Rear Turn Signal 2008 – 2013 PY21W
Courtesy 2008 – 2013 12961
Glove Box 2008 – 2013 DE3423
Map Light 2008 – 2013 12961
Trunk 2008 – 2013 6411
Low Beam Headlight 2013 H7
High Beam Headlight 2013 H7
Front Fog Light 2013 H8
Back Up Light 2013 921
Brake 2013 1156
Dome Light 2013 194
Front Turn Signal 2013 PY21W
Parking Light 2013 12961
Rear Turn Signal 2013 PY21W
Courtesy 2013 12961
Glove Box 2013 DE3423
Map Light 2013 12961
Trunk 2013 6411
Front Fog Light 2013 H8
Back Up Light 2013 921
Brake 2013 1156
Dome Light 2013 194
Rear Turn Signal 2013 PY21W
Courtesy 2013 12961
Glove Box 2013 6418
Map Light 2013 12961
Trunk 2013 6411
High Beam and Low Beam Headlight 2013 D1S
Front Fog Light 2013 H8
Back Up Light 2013 921
Brake 2013 1156
Daytime Running Light 2013 H8
Dome Light 2013 194
Front Turn Signal 2013 PY21W
Rear Turn Signal 2013 PY21W
Courtesy 2013 12961
Glove Box 2013 DE3423
Map Light 2013 12961
Trunk 2013 6411