BMW 63117316187 ballast to replace Lear 7316187 TMS Headlight Driver Module.
7316187 headlight driver module is factory fitted to BMW with Xenon Headlamps and D1S Gas Discharge HID bulbs.
7316187 module is responsible for controlling Xenon Lights, Halo Rings (Angel Eyes) and front indicators (turn signals, blinker).
Sometimes BMW cars experience sidelight (Angel Eyes) malfunction when only one halo ring stops to work, in this case it will be LED module (diode) to blame, not TMS ballast, but if both angel eyes have stopped to work the same time then it will be difinitely 7316187 ballast to blame for.
If you are experiencing any of these applications have malfunctions, when you will need to replace part.
TMS Driver Module fits BMW with Xenon Light headlamps without adaptive lighting option also known as curve lighting function.
Please double check provided part numbers to make sure it is correct part for your car.
Each headlight uses one unit of 7316187 BIX F10 BIXF10 TMS module.