HID Xenon Ballast Compatible With 05-08 Audi S4

Installing new headlights on your vehicle can result in fitment issues if they are improperly installed. Many times an alignment post is not inserted correctly, or a bracket is not tightened to the correct torque. In other cases, the incorrect part is being installed. We want to know if you have any installation issues with your new parts as soon as possible, so that we can help you figure out exactly what is wrong. Please contact us so we can help you save time with any questions you might have if something does not appear to fit correctly..

Yes we do. Check out our PERDE Xenon and Krypton bulbs while looking up your vehicle. These cast a brighter, white light that reflects well off the road and allows you to see further in the dark. In most cases, these only use 35 to 65 watts. Here at headlightsdepot.com, we offer a limited Lifetime Warranty on perde bulbs. That's how much we believe in this product!

HID stands for "High Intensity Discharge". These bulbs use an electric arc rather than the glowing filament in a Halogen bulb. HID headlamp bulbs do not run on low-voltage DC current like a Halogen Bulb, so they require a ballast, which controls and regulates the flow of current. This ballast will require an ignitor to light the bulb. This is either integrated directly into the bulb or as a separate unit which is occasionally part of the ballast, similar to fluorescent bulbs in your home. In a vehicle, HID bulbs tend to be much more expensive to replace than a Halogen bulb.