Electronic Ballast 034663 10R-034663 A71177E00DG Xenon D1S D3S D8S Ballast Kit HID Xenon Headlight D1R D1S For Focus Mk3 2011-2012

034663 10R-034663 A71177E00DG Xenon D1S D3S D8S Ballast Kit HID Xenon Headlight D1R D1S For Focus mk3 2011-2012 . The HID ballast is important because it helps start the light and also allows current to flow through the bulb so that the light stays on. This is another important function that involves controlling the current flowing through the bulb. Please double check the OEM part number and artwork to make sure it is compatible with your vehicle. If you are unsure if our product is compatible with your model, please contact us. ballast looks design,Xenon headlamp ballast are waterproof, vibration proof and dustproof, used under difficult conditions. Driver Module: Xenon headlight ballasts are installed at both ends of the front of the car for night lighting or when the car is driving on dimly lit roads, increasing the comfort of night driving, and are ideal.