For the 2012 Audi A4, both the low-beam and high-beam headlights use D3S bulbs. Verify the existing headlight assembly and vehicle equipment before ordering, since the supplied fitment data identifies D3S for both functions.
Fog-light fitment varies between H11 LED and H16 LED, so check the current fog-light socket and assembly. The front turn signal uses 12272NA, while the rear turn signal uses 7506.
Brake and tail-light fitment depends on the headlight type: vehicles with halogen headlights use 7506R, while vehicles with HID headlights use integrated LED lighting. The center stop light and daytime running lights are also LED.
- Reverse light: 921
- License plate and vanity lights: 6418
- Front side marker: 2825 or 98
- Dome light: 6411 or 6428
Interior, glove-box, map, and trunk lighting may use 2825 or 98 depending on the specific lamp assembly.