For the 2015 Audi TT, both the low-beam and high-beam headlights use D1S bulbs. This fitment data does not specify a separate bulb size by headlight type, so verify the existing bulb and headlamp assembly before ordering.
The fog-light application has two listed options: H11 LED and H16 LED. Confirm which fog-light configuration is installed on your TT, since these are separate fitments.
- Front turn signals use 7507 bulbs.
- Reverse lights use 921 bulbs, while rear turn signals are also listed as 921.
- Brake and tail lights use 7506R bulbs; the center stop light is LED.
- Daytime running lights, parking lights, and license-plate lights are LED.
- Courtesy, glove-box, map, and trunk lights may use 2825 or 98 bulbs.
- The vanity light uses a 6418 bulb.
Check the bulb currently installed when more than one option is listed, particularly for the fog lights and interior applications.