2018 Audi RS 3 bulb fitment data does not list a low-beam or high-beam bulb size. It also does not identify a projector, non-projector, or other headlight configuration, so a headlight bulb cannot be confirmed from the supplied information.
The available fitment details cover several interior locations. The dome light, glove box, interior light, map light, and trunk light each use bulb 2825. The vanity light uses bulb 6418.
- Low beam: No bulb listed.
- High beam: No bulb listed.
- Dome, glove box, interior, map, and trunk: 2825.
- Vanity: 6418.
Front fog light, front turn signal, and reverse-light bulb sizes are also not included in the supplied fitment data. Verify the original bulb or vehicle-specific documentation before ordering any unlisted application.