For the 2017 Volkswagen Tiguan, the low-beam headlight uses a D3S bulb. High-beam fitment is listed as either H15 or D3S, so identify the installed headlight assembly before ordering. The daytime running light also varies: H15 with halogen headlights and LED with HID headlights.
Several other exterior bulbs are commonly listed for this model. Front turn signals use 7507, rear turn signals use 7506, and reverse and tail lights use 921. The brake light uses 7506R, while the center stop light is LED. Front side markers and step lights use 2821.
For halogen-headlight vehicles, parking and license-plate lighting may use 2825 or 98; with HID headlights, those locations are listed as LED. Interior applications include 2825 or 98 for dome and map lights, 6418 for reading and vanity lights, and 6411 or 6428 for the trunk. Confirm the original bulb and headlight type before replacement.