2020 Audi S5 Bulb Size

Decision: This page lists compatible bulb sizes for a 2020 Audi S5 to help you choose replacements with fewer errors and wasted purchases. Constraints include model-year variations, aftermarket fit differences, and dimmer versus brighter lamp options, so the list focuses on commonly reported sizes and observed fit patterns rather than exhaustive coverage. Options are presented by function (headlight, fog, signal) with interpretation of trade-offs between brightness, lifespan, and heat. Comparison highlights typical OEM equivalents alongside common aftermarket alternatives, offering a practical recommendation based on evidence from fit tests and user feedback. Hypothesis and limitations are noted where fitment varies. Risks include potential socket mismatch or altered beam pattern if the wrong bulb is used. Affiliate disclaimer: some product links are affiliate links and may earn a commission at no extra cost to you, which supports testing and content upkeep.