Originally Posted by BMWWW
And another option is to do an actual retrofit (separating the housing to get access to the inside of the housing, replace stock projector with a superior projector) + labor which would be less than half that if you are open to using OEM parts from other car manufacturers. (components such as Acura TL projectors which are one of the best projectors available at a reasonable cost).
Both routes will result in a safer night-time drive. (Don't forget to adjust the aiming of the lowbeam! google HIDplanet: headlight aiming)
This is a shameless plug.... i have 2 BMW xenon headlights for sale, the lenses need to be changed and one has a broken tab. Easy to fix both items, install some ballasts and bulbs and your good to go with OEM xenon's!! $175 shipped!!