The 2015 Volkswagen GTI uses a D3S bulb for the low beam. High-beam fitment is listed as either H15 or D3S, so confirm the headlight assembly before ordering. The fog lights and center stop light use integrated LED units rather than replaceable bulb sizes.
- With halogen headlights, the front turn signal uses 64132, while HID headlights use 64136.
- Daytime running lights are H15 with halogen headlights and LED with HID headlights.
- Front parking and side-marker lighting is 2825 or 98 with halogen headlights, and LED with HID headlights.
- Rear turn signals use 7440; brake and tail lights use 7440R.
- Reverse lights use 921, and license-plate lighting is listed as 2825 or 98.
- Interior fitments include 2821 for the glove box, 2825 or 98 for map lights, 6411 or 6428 for the trunk, and 6418 for the vanity light.
Because several front-lighting positions differ between halogen and HID configurations, match the bulb to the installed headlight type and verify the original bulb where the data lists multiple options.