For the 2009 Audi A4, both the low-beam and high-beam headlights use D3S bulbs. Confirm the vehicle’s original headlight setup before ordering, especially if replacing a complete lighting assembly.
The fog-light fitment is listed as either H11 LED or H16 LED, so check the existing socket and lamp design. Front turn signals use 12272NA bulbs, while the rear turn signals use 7506. Reverse lights use 921 bulbs.
Brake and tail-light fitment depends on the headlight configuration: vehicles with halogen headlights use 7506R bulbs, while vehicles with HID headlights use integrated LED lighting for these functions. The center stop light and daytime running lights are also LED.
- Front side marker: 2825 or 98
- License plate and vanity lights: 6418
- Dome light: 6411 or 6428
- Glove-box, map, trunk, interior, and step lights may use the listed 2825, 98, or LED options depending on location