Audi A4 2023 Bulb Size
Bulb size chart
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.
FAQ
Does the 2023 Audi A4 use the same bulb sizes on every trim?
No. The 2023 Audi A4 can vary by trim, lighting package, body style, and market. Many exterior and interior positions are LED, but some versions use specific halogen or HID-related bulbs, so it is best to confirm by lighting position.
Which bulb is used for the glove box light on the 2023 Audi A4?
The glove box light bulb is listed as 2821 for the 2023 Audi A4.
What bulb does the HID headlight setup use on this A4?
For 2023 Audi A4 models with HID headlights, the headlight bulb high beam and low beam is listed as D5S.
What bulb is used for the front turn signal with HID headlights?
The front turn signal light bulb for versions with HID headlights is listed as 64132.
Are the headlight bulbs different on A4 models with LED headlights?
Yes. The page lists the headlight bulb high beam and low beam for models with LED headlights as LED, while HID-equipped versions use D5S.
How do I know if my 2023 Audi A4 has LED or HID headlights?
Check the installed headlight assembly, your owner’s manual, or the existing bulb type before ordering. The correct replacement depends on the lighting package fitted to your car.
Which exterior bulbs are listed as LED on the 2023 Audi A4?
Several exterior positions are listed as LED, including the brake light, license plate light, parking light, tail light, daytime running light, rear turn signal, back-up reverse light, center high mount stop light, and side markers.
What should I check before replacing a rear turn signal or brake light bulb?
Confirm the exact lamp position and whether your car uses the LED version shown on the page. The rear lighting layout can differ by market and trim, so matching the correct position is important.
Can I use aftermarket LED bulbs in place of factory bulbs on the 2023 Audi A4?
Sometimes, but fitment and compatibility depend on the housing, connector, and vehicle electronics. Aftermarket conversions may also trigger warnings or uneven light output if they are not designed for the A4.
Why does the page separate bulb sizes by lighting position?
Because the same car can use different bulbs in different locations. Separating by position helps you verify the exact bulb for the dome light, map light, license plate light, reverse light, or headlight instead of guessing.
What interior bulbs are covered for the 2023 Audi A4?
The page includes vanity mirror, trunk or cargo area, dome, map, interior door, stepwell, and glove box lighting, along with the bulb type listed for each position.
Should I check the old bulb before ordering a replacement?
Yes. Checking the installed bulb is one of the best ways to avoid ordering the wrong part, especially on a 2023 Audi A4 where trim and lighting package differences can change the correct fitment.