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 Headlight2008 – 2013 H7
High Beam Headlight2008 – 2013 H7
Front Fog Light2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light2008 – 2013 921
Brake2008 – 2013 1156
Dome Light2008 – 2013 194
Front Turn Signal2008 – 2013 PY21W
Parking Light2008 – 2013 12961
Rear Turn Signal2008 – 2013 PY21W
Courtesy2008 – 2013 12961
Glove Box2008 – 2013 DE3423
Map Light2008 – 2013 12961
Trunk2008 – 2013 6411
Front Fog Light2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light2008 – 2013 921
Brake2008 – 2013 1156
Dome Light2008 – 2013 194
Rear Turn Signal2008 – 2013 PY21W
Courtesy2008 – 2013 12961
Glove Box2008 – 2013 6418
Map Light2008 – 2013 12961
Trunk2008 – 2013 6411
High Beam and Low Beam Headlight2008 – 2013 D1S
Front Fog Light2012 – 2013 H8
2008 – 2011 H8/H11/H16
Back Up Light2008 – 2013 921
Brake2008 – 2013 1156
Daytime Running Light2008 – 2013 H8
Dome Light2008 – 2013 194
Front Turn Signal2008 – 2013 PY21W
Rear Turn Signal2008 – 2013 PY21W
Courtesy2008 – 2013 12961
Glove Box2008 – 2013 DE3423
Map Light2008 – 2013 12961
Trunk2008 – 2013 6411
Low Beam Headlight2013 H7
High Beam Headlight2013 H7
Front Fog Light2013 H8
Back Up Light2013 921
Brake2013 1156
Dome Light2013 194
Front Turn Signal2013 PY21W
Parking Light2013 12961
Rear Turn Signal2013 PY21W
Courtesy2013 12961
Glove Box2013 DE3423
Map Light2013 12961
Trunk2013 6411
Front Fog Light2013 H8
Back Up Light2013 921
Brake2013 1156
Dome Light2013 194
Rear Turn Signal2013 PY21W
Courtesy2013 12961
Glove Box2013 6418
Map Light2013 12961
Trunk2013 6411
High Beam and Low Beam Headlight2013 D1S
Front Fog Light2013 H8
Back Up Light2013 921
Brake2013 1156
Daytime Running Light2013 H8
Dome Light2013 194
Front Turn Signal2013 PY21W
Rear Turn Signal2013 PY21W
Courtesy2013 12961
Glove Box2013 DE3423
Map Light2013 12961
Trunk2013 6411