Audi S4 2023 Bulb Size
Bulb size chart
The 2023 Audi S4 uses LED lighting across nearly every exterior and interior position, and this page is designed to help you verify bulb sizes by lighting location. Whether you are replacing a failed lamp or checking what is installed before ordering, the bulb chart below organizes the fitment information by position so you can match the correct light to the correct socket.
Because the 2023 Audi S4 can vary by trim, market, and lighting package, it is important to confirm the bulb type for each specific area of the car. This year page focuses on the common lighting positions found on the S4, including headlights, brake lights, turn signals, license plate lights, interior lamps, and cargo-area lighting.
For best fitment, always compare the bulb chart with the actual lamp in your vehicle before buying, especially if your S4 has a different trim, optional package, or regional lighting setup. Some positions may use LED modules rather than replaceable halogen bulbs, and aftermarket LED conversions can change the required part style, connector, or warning behavior. If a light has already been modified, the original bulb listing may no longer match what is installed, so checking the existing bulb or housing is the safest way to avoid a mismatch.
FAQ
Does the 2023 Audi S4 use LED bulbs for most exterior lights?
Yes. The 2023 Audi S4 is listed with LED lighting for the main exterior positions, including the low beam, high beam, daytime running light, brake light, tail light, turn signals, license plate lights, and reverse lights.
Can I use this page to check bulb sizes by lighting position?
Yes. This page is organized by lighting position so you can verify the bulb type for each area of the 2023 Audi S4, instead of searching by generic bulb name alone.
Are the headlight low beam and high beam bulbs the same on the 2023 Audi S4?
Not necessarily. The chart shows both low beam and high beam as LED, but that does not mean they are interchangeable. Always confirm the exact position before ordering or replacing anything.
Do brake lights and tail lights use the same bulb type on this model?
Both are listed as LED on the 2023 Audi S4, but they serve different functions and may be separate lighting elements in the housing. Check the specific location on the vehicle before replacing a part.
What should I know about the front and rear turn signal bulbs?
The front and rear turn signal light positions are both listed as LED. Because Audi often uses integrated LED assemblies, replacement may involve the lamp module rather than a simple plug-in bulb.
Is the license plate light on the 2023 Audi S4 replaceable?
The license plate light is listed as LED. Depending on the exact trim or market, it may be a replaceable LED bulb or an integrated unit, so it is best to inspect the housing before purchasing parts.
Are interior bulbs on the 2023 Audi S4 all the same?
No. Interior lighting positions such as the dome light, map light, vanity mirror light, interior door light, trunk or cargo area light, stepwell light, and glove box light can use different bulb styles or LED modules.
What is the glove box bulb size for the 2023 Audi S4?
The glove box light is listed as 2821. That is the only exact bulb size provided in the chart for this page.
Why does trim or lighting package matter on the 2023 Audi S4?
Trim and lighting package can change the exact lamp design, especially for exterior LED assemblies and interior convenience lighting. A bulb listed for one version of the S4 may not match another version in a different market.
Can I convert halogen bulbs to LED on a 2023 Audi S4?
Some owners do aftermarket LED conversions, but fitment depends on the housing, connector, and vehicle electronics. If the car was not originally equipped with that setup, the conversion may require additional parts or coding.
Should I check the installed bulb before ordering replacements?
Yes. Checking the installed bulb or the existing lamp assembly is the most reliable way to confirm fitment, especially on a 2023 Audi S4 with optional equipment or prior modifications.
What if my 2023 Audi S4 has a different bulb than the chart shows?
That can happen if the car has a different market specification, a lighting package change, or a previous repair or conversion. In that case, use the installed part as the final reference rather than relying only on the model-year listing.