2019 Audi S5 Bulb Size

Misconception: people often think a single bulb size works for every car light, so grabbing any “lookalike” will do. It seems true because many bulbs look similar and parts stores sell common types under simple labels. Think of it as an appealing shortcut, but it’s a shaky mental model. What is true: bulbs vary by socket, trim, and whether your 2019 Audi S5 has LED or halogen packages. This list exists to map each lamp (headlight, fog, turn, reverse, interior) to the correct socket so you can buy the right replacement without guessing. A simple rule of thumb: match the function and socket type rather than appearance. Implications and quick recap: use the chart to confirm fit, keep a photo of your current bulb as backup, and consider OEM versus aftermarket options based on brightness and longevity. Disclosure: some links on this page are affiliate links, meaning I may earn a commission if you buy through them at no extra cost to you.