BMW TMS Headlight Driver Module 7269494 7269531 7316208 7279625 7274400 is factory fitted on 5 Series F10, F11 Pre-Facelift, and F07 GT with Xenon Headlamps, and D1S HID bulbs for main beam. This Module is responsible for light leveling also known as vertical aim control, LED Angel Eyes (Halo Rings), Daytime Running Lights, and front turn signal indicator lights. If you find a malfunction related to all these lights’ functions, it simply means replacement is required.