For the 2006 Audi A4, headlight bulb fitment depends on both body style and headlight type. Base models use an H7 high beam. The low beam is H7 with halogen headlights or D1S with HID headlights. Cabriolet models use an H9 high beam with halogen headlights; Cabriolet HID low beams use D2S.
- Fog light options listed are H11 LED and H16 LED.
- Front turn signals and parking or front side markers use 3457A, with 2827 also listed for the front turn signal.
- Reverse lights use 7506. Base brake lights use 7506R, while Cabriolet brake lights use 7225.
- Tail lights are 5007 on Base models and 7225 on the Cabriolet. Rear turn signals use 7507.
- The center stop light is LED. License plate and vanity lights use 6418; interior, glove box, trunk, and step-light fitments include 2825 and 98 where listed.
Confirm the vehicle configuration and compare the original bulb before ordering, particularly for Cabriolet courtesy-light options.