Audi 4000S HID Xenon Bulbs are designed for this Audi 4000 that is the equivalent to European version called the Audi 80. These audi 4000S HID Xenon Bulbs are essential to upgrade this sensation of a vehicle that was produced for around 40 years (from 1966-1996). Initially the Audi 80 was essentially the Volkswagen Passat and it eventually diverged from its Volkswagen counterpart in the mid 1970s. In the United States the Audi 80 was initially called the FOX for a brief stint and then it took on the 4000 name in 1980. The vehicle was designed by Italian designer Giorgetto Giugiaro. This vehicle proved to be quite profitable because it borrowed parts from many of its counterparts at audi and did not require intire part redesigns. View our inventory of Audi 4000S HID Xenon Bulbs. These Audi 4000S HID Xenon Bulbs were designed to suit even the pickiest Audi enthusiast. Bulbs and HID are the road illuminating parts of a car. Bulbs can be either halogen or HID which means high intensity discharge. Halogen lights are more common on lower end vehicle and are distinguished by their yellow glow, while hid lights are generally imbedded in higher end vehicles and contain a more white, blue, or purplish light. Bulbs and HID can be purchased to increase the vision of drivers during night time driving. High quality blubs and hid are important for drivers to see what they are driving towards at night.