For BMW 1 Series F20 F21 Upgrade Xenon HID to D1S LED Conversion Low Beam Canbus
UPGRADE Xenon HID to D1S LED Conversion Kit ?. 300% Brighter. These will replace any factory fitted D1S bulb. This is what xenon bulbs often do just before they fail. Single beam or Bi-Xenon use. NO SOLDERING REQUIRED!