2000 Audi A4 Replacement Fog Light Bulbs – CARiD Audi A4 / A4 Quattro 2000, Performance Halogen Fog Light Bulbs by Lumen®. 1 Pair, White color bulbs, 55W. Upgrade your lighting with these superior-grade Performance halogen bulbs to 2000 Audi A4 Custom & Factory Fog Lights – CARiD Audi A4 / A4 Quattro 2000, Driver Side Replacement Fog Light by Replace®. Chrome housing, clear lens. Without trim. Fog lights are the first line of defense against poor visibility in inclement weather, and that's why they must operate..