Xenons4U is the UK’s leading high quality and affordable car parts provider. We offer BMW 7440878 7427611 7409580 7381018 LEAR 535100866 53510086B 53510086E 53510086F LED TMS Headlight Driver Module. To identify when you need to replace headlight control module there are many different malfunctions and errors, it could show red headlight error sign, show vertical aim control failure, it means that your LED lights can't be aligned and light will be pointed downwards only, also it controls LED Angel Eyes (Daytime Running Lights) if they flicker or both rings have stopped to shine at all, LED turn signal doesn't work or low or high LED beam doesn't work, then it means that BMW headlight driver module has failed. These are the most common issues when you can identify that the headlight module has failed and needs to be replaced with new. For more information visit our website.