This 2023 Audi A4 bulb guide helps you verify bulb sizes by lighting position, so you can match the correct replacement to the exact lamp on the car. Because the A4 can use different lighting setups depending on market, trim, and body style, the safest way to shop is by checking the specific bulb location instead of assuming one size fits every version.
On this page, you can quickly review exterior and interior bulb fitment for the 2023 Audi A4, including headlight, tail light, license plate, reverse, turn signal, and cabin lights. That makes it easier to replace a single failed bulb or plan a full lighting refresh with confidence.
Fitment can vary on the 2023 Audi A4 based on trim package, lighting option, and whether the car uses LED headlights or HID headlights. Some positions are listed as LED, while others use specific bulbs such as 2821 for the glove box, 64132 for the front turn signal with HID headlights, and D5S for the HID low/high beam setup. If you are converting to aftermarket lighting or replacing a bulb after a warning message, check the installed bulb and connector style before buying, since the same model year may have different parts across markets and equipment levels.
