BMW e53 (00-03) Control Unit for Xenon Headlight L=R hid ballast lamp ignition Control Unit for Xenon Headlight Brand NEW part with full 1 year warranty. BMW part# 63 12 8 386 708, note the mid-year splits. Genuine BMW part, recently made: not been lying around. PLEASE NOTE the mid-year split on PRODUCTION date. See Models Chart BELOW. Not sure about your car? email us your VIN to confirm.