Originally Posted by
Overboost
If you retrofit single beam Xenon (not BiXenon) the high beams will work with the center halogen lights just as they do now and will plug directly in and the only thing that will not work is the auto leveling. Auto leveling can also be retrofitted but it takes quite a bit of wiring from the front to the rear through the LCM itself and then ultimately to the level connectors on the headlight housings. If you get BiXenons, you will need to wire the high beam shutters from the LCM as well.
Depending on your LCM, you may need a different LCM that has the leveling circuitry so you will be on a LCM part number search to see if your LCM will work with all the work you put into the level sensors and wiring.
If you are OK with a manual level adjustment at the headlight adjustment screws and a set of standard single beam Xenons, you can have the Xenon headlights plug directly in and code the car for Xenon with BMW Scanner 1.4 or INPA in a matter of minutes. (Without coding they will turn on and operate but will randomly flash and shut off)