For sale is a brand new custom wiring harness for those interested in retrofitting pre LCI (2015-2017) LED adaptive headlights or 2018+ LCI adaptive LED headlights in the 2015-2017 M3/M4 Series that came from factory with Adaptive Xenon Headlights. 

Comes with detailed installation guide.

This is just the wiring and does not include the LED headlights.

Please let me know if you are planing to install pre LCI (2015-2017) LED headlights or LCI (2018+) LED headlights, since there are small differences in harness.

Necessary coding/programing needs to be performed to enable LED headlights to work after the retrofit. For extra fee I can help doing it remotely.

DISCLAIMER: As will all DIY projects, undertake this at your own risk. I am not responsible for anything that happens to you or your car if you connect it wrong!