2021 Audi S5 Bulb Size

tl;dr: This bulb size chart lists common replacement bulbs for a 2021 Audi S5, including headlights, fogs, and interior lamps. Recommendation: Use the chart to match bulb type, fit, and brightness before ordering parts. Impact: Picking the correct bulb avoids installation delays and electrical issues, and preserves beam pattern and safety. I’ve replaced bulbs on many Audis and this checklist reduces trial-and-error. Risks: Incorrect bulbs can cause glare, poor illumination, or socket damage. Next actions: Check your vehicle manual, confirm part numbers on the chart, then buy from a trusted seller. Affiliate disclosure: Some product links are affiliates; I may earn a small commission at no extra cost to you.