1. OE Number: The referencing OE number of this Xenon headlight starter is 1307329080, which is molded and designed depend on the original data. 2. Fitment: The headlight Xenon igniter is a replacement for E46 3 series sedans and wagons, for E46 3 series coupes and convertibles, for M3 2002 4. Function: The headlight ballast control unit provides the voltage needed to start the lights and regulates the current to the lights after lighting. 5. Material: The ballast module is made of plastic material, which has good heat dissipation and shock resistance. Make your night driving safer. 6. Easy to Install: Stringently manufactured to meet the original standard, perfect replacement for the old or broken one, improving the time efficiency.