Audi S4 2019 Bulb Size
Bulb size chart
If you are looking up bulb sizes for the 2019 Audi S4, this page is designed to help you verify the correct bulb by lighting position. Instead of guessing from a single generic fitment list, you can check the exterior and interior lamp locations one by one, which is especially useful on a car like the S4 where equipment can vary by market and trim.
The 2019 Audi S4 uses LED lighting for many of its exterior and cabin functions, including the low beam, high beam, daytime running light, brake light, turn signals, and several interior lamps. That means some positions are not traditional replaceable bulbs in the usual sense, but the page still helps you identify which lamps are LED-equipped and where a serviceable bulb may apply.
For best fitment results, always compare your car’s trim, lighting package, body style, and market-specific equipment before ordering parts. Some 2019 Audi S4 models may use different lamp assemblies or LED modules depending on whether the car has factory LED lighting, optional packages, or regional specification differences. If you are considering an aftermarket LED conversion, make sure the bulb type, connector style, polarity, and space inside the housing are all compatible. When possible, inspect the installed bulb or lamp assembly before buying, since the same model year can use different parts for different positions and options. This is especially important for interior bulbs and the glove box light, where the listed fitment may differ from the main exterior lighting system.
FAQ
What does this 2019 Audi S4 bulb page help me verify?
It helps you verify bulb sizes and lamp types by lighting position, so you can match the correct part to the exact location on the vehicle instead of relying on a single general fitment guess.
Does the 2019 Audi S4 use LED lighting for most exterior bulbs?
Yes. The available fitment list shows LED lighting for many exterior positions, including the low beam, high beam, brake light, turn signals, license plate lights, tail lights, daytime running lights, and side markers.
Can I replace the headlight bulbs on a 2019 Audi S4 with standard halogen bulbs?
Not if the car is equipped with factory LED headlight assemblies. In that case, the lighting is integrated into the headlamp unit rather than using a simple halogen bulb swap.
What bulb type is listed for the glove box light on the 2019 Audi S4?
The glove box light is listed as 2821. That is one of the few positions on this page with a specific non-LED bulb type shown in the available data.
Are the interior lights on the 2019 Audi S4 all the same bulb size?
Not necessarily. The page includes separate positions such as vanity mirror, dome, map, interior door, trunk or cargo area, and stepwell lights, and each position can use a different lamp or LED module depending on the vehicle’s equipment.
Why do trim and lighting package differences matter on this car?
Because Audi may use different lamp assemblies or bulb types depending on trim level, optional packages, body style, and market. A bulb that fits one 2019 S4 may not match another if the lighting setup is different.
How do I know whether my 2019 Audi S4 has a replaceable bulb or a sealed LED module?
Check the installed lamp assembly and compare it with the lighting position on the page. Many exterior lights on this model are LED-based, which often means the bulb is not serviced separately in the same way as a conventional incandescent bulb.
Can aftermarket LED bulbs be used in the 2019 Audi S4?
Sometimes, but fitment is not just about bulb size. You also need to confirm connector compatibility, polarity, heat management, and whether the housing is designed for a retrofit LED bulb. Some positions may work better than others.
What should I check before ordering a replacement bulb for the license plate light?
Confirm the exact bulb position, inspect the installed bulb or housing if possible, and make sure the replacement matches the factory connector and physical size. The 2019 Audi S4 license plate light is listed as LED, so the assembly may not use a standard bulb in every configuration.
Are the brake lights and tail lights separate on the 2019 Audi S4?
Yes, they are listed as separate lighting positions on this page. That is useful because brake light and tail light functions may be handled by different LED elements or sections of the rear lamp assembly.
Why is it important to check the installed bulb before buying?
Because the same model year can have different lighting setups, and visual confirmation is the safest way to avoid ordering the wrong part. This is especially true for optional equipment, interior lamps, and any position where the vehicle may use an LED module instead of a standard bulb.
Does this page cover both front and rear turn signal bulbs for the 2019 Audi S4?
Yes. The available list includes both front and rear turn signal light positions, and both are shown as LED on this page.