I have noticed that my low beam is not as bright as it was and I have led adaptive headlights so I was wondering if I can replace led bulbs only or it is a complete system as the dealer informed me which cost close to 4K usd

Appreciate your feedback

LED headlights don’t use “bulbs”…it uses a light module (see #11 in diagram below). BMW does sell repair kits (#1 & #2 in diagram)…I’m not quite sure what is in the kit…the parts dept (not the service dept) at your local ‘BMW dealership could offer more info as to what the kit contains or what the kit is used to repair.

If you had Xenon or Halogen headlights…those older headlight technologies use “bulbs”.

Click this link to go directly to the part database for the diagram below…since you give no vehicle info other than you have a F26…I selected the X4 35i…but the LED headlights are probably the same across all the F26 X4 models:

http://bmwfans.info/parts-catalog/F26/USA/X4_35iX-N55/mar2016/browse/lighting/single_parts_headlight_led/

Thank you for the information