WMPHE Xenon HID Headlight Ballast Replacement for 8K0941597 Compatible with Audi A3/A4/A5/A6/A7/A8/Q7/Q5/RS5/S4/S5/S6/S7/S8, VW CC/Eos/Jetta/Tiguan/Touareg Control Unit W003T18471 W003T22071

HID headlight ballast is responsible for supplying power to your headlight's bulb. Every ballast is designed to connect directly to your vehicle and requires NO programming or coding. Xenon Headlight Ballast Replace OEM Number 8K0941597. Compatible with Following Vehicles Audi A3 / A4 / A5 / A6 / A7 / A8 Quattro/ Q7 / Q5 / RS5 / S4 / S5 / S6 / S7 / S8,VW CC, VW Eos, VW Jetta, VW Tiguan, VW & more. See below for full list of vehicles"". Input Voltage is DC 12V not fit 24V, Output Voltage&Power 1200VDC,Fits D1R D1S left or right headlight bulb. Ballast will be stop working If water vapor enters, please check water Leakage headlight assembly issue before installation. Each of your vehicle’s headlights has its own ballast. While the HID Xenon Ballasts do commonly fail so can your factory headlight bulb