2018 Audi S5 Bulb Size

Misconception: people often think a bulb size chart is just busywork, and that any bulb-like part will fit a 2018 Audi S5. It seems true because many bulbs look similar and the car manual can be dense. What is true: the chart is a practical, quick reference that matches socket types, wattages, and common replacements for the 2018 Audi S5. Think of it as a mental model to avoid buying the wrong headlight, brake, or interior bulb. A simple rule of thumb: check socket type and visibility spec before ordering. Implications and quick tests: use the list to confirm part numbers, then compare the old bulb visually and by part stamp. Quick recap — this saves time and prevents returns. Some links are affiliate; I may earn a small commission at no extra cost to you.