Below is a list of light bulb types used in 2010-2018 AUDI A1 lighting system, covering hatchback vehicles.
Headlight bulb: low beam - H7, D3S or D8S / high beam - D3S, D8S, H15 or H1
Parking light bulb: H15 or W21W
Fog light bulb: H8 or H11
Front indicator/turn signal bulb: HY21W
Daytime running light bulb: H15 or W21W
Rear indicator/turn signal bulb: W16W
Tail light bulb: P21W
Brake light bulb: P21W
Back-up light bulb: W16W
Rear fog light bulb: P21W
License plate light bulb: C5W
Interior light bulb: W5W
Boot light bulb: W5W
Reading light bulb: W5W
Glove compartment light bulb: W5W
Light bulb sizes for other AUDI A1 generations: A1 (GB)