2007 Audi S4 bulb fitment starts with D1S xenon bulbs for both the low-beam and high-beam headlights. The supplied fitment data does not list a separate bulb size or a projector/non-projector headlight distinction, so confirm the existing headlamp assembly before ordering.
- Fog lights are listed with either H11 LED or H16 LED fitment; check the fog-light housing and connector to identify the correct option.
- Front turn signals, reverse lights, daytime running lights, and rear turn signals use 7506 bulbs.
- Brake lights use 7506R bulbs, while the center stop light is LED.
- Parking lights and front side markers accept 2825 or 98 bulbs.
- License plate and trunk lights use 6418 bulbs. Interior listings include 6411 or 6428 for the dome and engine areas, 64111 for map lights, and 2825 or 98 for the glove box.
For the headlights, replace low- and high-beam bulbs in matching D1S applications and verify the vehicle’s installed equipment before purchase.