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Audi S3 2018 Bulb Size
Bulb size chart
Headlight Bulb High Beam and Low Beam - LED
Back Up Reverse Light Bulb - LED
Brake Light Bulb - LED
Center High Mount Stop Light Bulb - LED
Cornering Light Bulb - LED
Daytime Running Light Bulb - LED
License Plate Light Bulb - LED
Parking Light Bulb - LED
Side Marker Light Bulb Front - LED
Side Marker Light Bulb Rear - LED
Stepwell Light Bulb - LED
Tail Light Bulb - LED
Turn Signal Light Bulb Front - LED
Turn Signal Light Bulb Rear - LED
Dome Light Bulb - 2825, 98
Glove Box Light Bulb - 2825, 98
Interior Door Light Bulb - 2825, 98
Map Light Bulb - 2825, 98
Trunk or Cargo Area Light - 2825, 98
Vanity Mirror Light Bulb - 6418
2825 Bulbs
Used for: Dome Light Bulb, Glove Box Light Bulb, Interior Door Light Bulb, Map Light Bulb, Trunk or Cargo Area Light
98 Bulbs
Used for: Dome Light Bulb, Glove Box Light Bulb, Interior Door Light Bulb, Map Light Bulb, Trunk or Cargo Area Light
6418 Bulbs
Used for: Vanity Mirror Light Bulb
The 2018 Audi S3 uses a mix of LED exterior lighting and a few traditional interior bulbs, so it helps to verify each bulb size by lighting position before ordering replacements. This page is organized to make that easier, whether you are checking the headlights, brake lights, turn signals, or cabin lights.
Because trim and lighting equipment can vary by market and body style, the bulb chart for the 2018 Audi S3 is best used as a position-by-position reference. That way you can match the correct bulb to the headlight, tail light, license plate light, or interior lamp instead of guessing from the model name alone.
Fitment can differ between trims and lighting packages, especially on cars equipped with factory LED systems or region-specific equipment. Some exterior lamps on the 2018 Audi S3 are LED assemblies rather than replaceable bulbs, while interior locations such as the glove box, dome, map, trunk, and door lights use small bulbs like 2825/98, and the vanity mirror light uses a 6418. If you are considering an aftermarket LED conversion, check whether the housing is designed for halogen or LED use, and confirm whether resistors or coding changes are needed to avoid warning messages or hyperflash. The safest approach is to inspect the bulb already installed in your car before buying replacements, especially if your S3 has had previous repairs or a lighting package change.
FAQ
What bulb size does the 2018 Audi S3 use for the headlights?
The headlight high beam and low beam on the 2018 Audi S3 are listed as LED. In many cases this means the light is part of an LED assembly rather than a simple replaceable bulb, so you should verify the exact setup on the vehicle before ordering parts.
Are the brake lights on the 2018 Audi S3 replaceable bulbs?
The chart lists the brake light bulb as LED. Depending on the housing design, the brake light may be part of an integrated LED unit rather than a standard service bulb, so confirm the rear lamp style before purchasing.
What is used for the front turn signals on this S3?
The front turn signal light bulb is listed as LED. If your car has a factory LED front lamp assembly, the turn signal may not be a separate bulb that can be swapped individually.
What bulb fits the license plate lights on a 2018 Audi S3?
The license plate light bulb is listed as LED. Check the lamp housing and connector style on your specific car, since some LED license plate lights are sold as complete modules.
What size is the glove box light bulb?
The glove box light bulb is listed as 2825, 98. Those are the bulb types to match when replacing the glove box lamp in a 2018 Audi S3.
What bulb does the dome light use?
The dome light bulb is listed as 2825, 98. If your interior light has been converted or replaced before, compare the installed bulb to the chart before ordering.
What bulb size is used in the map lights?
The map light bulb is listed as 2825, 98. This is one of the interior bulbs that is more likely to be serviceable than the exterior LED lighting on the car.
What bulb fits the vanity mirror light?
The vanity mirror light bulb is listed as 6418. It is a good idea to check the bulb in the visor before buying, because some cars may have had prior interior trim changes.
Do the tail lights and rear turn signals use separate bulbs?
The chart lists the tail light bulb as LED and the rear turn signal light bulb as LED. On the 2018 Audi S3, these may be integrated into LED lamp assemblies, so replacement can depend on the exact rear light design.
What should I check before buying replacement bulbs for my 2018 Audi S3?
First confirm the exact lighting position, then inspect the bulb or lamp assembly already installed in the car. Trim level, market, body style, and lighting package can all affect fitment on the 2018 Audi S3.
Can I swap the factory LED lights for aftermarket bulbs?
Some exterior lights on the 2018 Audi S3 are factory LED units, so a simple bulb swap may not be possible. For locations that do accept bulbs, make sure any aftermarket LED replacement is compatible with the housing and does not trigger errors or cause poor beam pattern.
Which interior bulbs on the 2018 Audi S3 are listed as 2825, 98?
The glove box light, trunk or cargo area light, dome light, map light, and interior door light are all listed as 2825, 98. Those are the key interior positions to match when replacing cabin bulbs.