Audi S4 2013 Bulb Size
Bulb size chart
This 2013 Audi S4 bulb size guide helps you verify the correct replacement bulb by lighting position, so you can match the right part to the right lamp before you buy. Whether you are replacing an exterior signal light, a cabin lamp, or the headlight bulb, using the position-based chart makes it easier to confirm fitment for your specific S4.
The 2013 Audi S4 can use different lighting setups depending on trim, package, market, and body style, so it is smart to check each bulb location individually. This page is organized by function, which makes it simple to compare the bulb size for the headlight, brake light, license plate light, interior lights, and other positions on the car.
For the best fitment results, compare the bulb chart with the bulb already installed in your vehicle, especially if your S4 has had previous repairs or aftermarket lighting changes. Some positions may be LED on one car and different in another market or package, and halogen-to-LED conversions may require extra parts, resistors, or coding to avoid warnings or uneven operation. If you are unsure, remove the old bulb first and verify the base, shape, and connector before ordering a replacement.
FAQ
What bulb does the 2013 Audi S4 use for the low beam and high beam headlights?
The listed headlight bulb for both high beam and low beam is D3S. Always confirm your existing setup before ordering, since headlight systems can vary by market or prior modifications.
What is the reverse light bulb size on a 2013 Audi S4?
The back up reverse light bulb is 921 on this page. If one side has already been changed, compare both sides to make sure the replacement matches the installed bulb and socket.
Which bulb size fits the front turn signal on the 2013 Audi S4?
The front turn signal light bulb is listed as 64132. This is a useful reference when replacing a burned-out signal or when checking whether the car still has the original bulb type.
Are the brake lights and tail lights on the 2013 Audi S4 LED?
Yes, the chart lists the brake light bulb and tail light bulb as LED. That means the replacement is typically tied to the lamp assembly or LED module rather than a simple standard replaceable bulb in many cases.
What bulb is used for the license plate lights?
The license plate light bulb is listed as LED. If the license plate lights are dim, flickering, or out, check the housing and connector as well as the light source itself.
What bulb size is used for the map lights in the cabin?
The map light bulb is 2825 or 98. These are common interior bulb sizes, but it is still a good idea to verify the installed bulb before buying replacements.
What bulb fits the dome light in a 2013 Audi S4?
The dome light bulb is listed as 6411 or 6428. Either size may appear depending on the exact interior configuration, so checking the existing bulb is recommended.
What bulb size is used for the vanity mirror light?
The vanity mirror light bulb is 6418. If the mirror light is not working, inspect the bulb and the contact points in the visor assembly.
Does the 2013 Audi S4 use the same bulb sizes for all trim levels?
Not always. Trim, lighting package, body style, and market can change the bulb setup, so the correct bulb size should be confirmed by lighting position and by the bulb currently installed.
Can I switch the 2013 Audi S4 exterior bulbs from halogen to LED?
Some exterior positions are already listed as LED, but halogen-to-LED conversions on other positions may need additional hardware or coding. Fitment, beam pattern, and warning messages should all be checked before converting.
What should I check before ordering replacement bulbs for my 2013 Audi S4?
Check the exact light position, confirm the installed bulb number, and inspect the socket and housing condition. This is especially important if the vehicle has aftermarket lighting, previous repairs, or a different market specification.
Which interior bulbs use 2825 or 98 on the 2013 Audi S4?
The chart lists 2825 or 98 for the glove box light, trunk or cargo area light, map light, interior door light, and courtesy light. These shared sizes are common, but each location should still be verified before purchase.