For the 2015 Audi Q7, the supplied fitment data lists a D3S bulb for both the low-beam and high-beam headlights. This means the same D3S size is specified for both primary headlight functions.
Fog-light fitment includes several listed options: H11 LED, H16 LED, and 921. These are separate fitment entries rather than a single combined bulb specification, so check the existing fog-light socket, housing, and vehicle configuration before ordering. The supplied data does not identify which fog-light option applies to a particular Q7 trim or lamp assembly.
No front turn-signal or reverse-light bulb fitment is provided here. When replacing a headlight bulb, match the D3S designation and confirm the lamp assembly before purchase. For fog lights, compare the original bulb and connector with the listed option to avoid selecting the wrong application.