Audi S5 2018 Bulb Size
Bulb size chart
This page covers the 2018 Audi S5 and helps you verify bulb sizes by lighting position, so you can match the correct replacement to each lamp on the car. Because Audi used LED lighting across many exterior and interior locations on this model year, the exact fit can depend on the specific trim, body style, and lighting package.
Use this guide as a position-by-position reference for common bulbs on the 2018 S5, including headlights, brake lights, turn signals, license plate lights, interior lights, and cargo-area lighting. Checking the bulb location first is the easiest way to avoid ordering the wrong part and to make sure the replacement matches the original setup.
Fitment can vary by market, trim, and equipment package, so the same 2018 Audi S5 may not use identical lighting components in every region or body style. Some vehicles are equipped with factory LED units that are not serviced like traditional halogen bulbs, while others may have different lamp assemblies or optional lighting features. If you are considering an aftermarket LED conversion, confirm that the housing, connector, and electrical compatibility are appropriate for your car. The safest approach is to inspect the installed bulb or lamp assembly before buying, especially for interior lights and any optional exterior lighting items.
FAQ
Does the 2018 Audi S5 use LED bulbs for most lighting positions?
Yes, the available bulb chart for the 2018 Audi S5 shows LED lighting for many exterior and interior positions, including the headlights, brake lights, turn signals, DRLs, license plate lights, and several cabin lights. That means many of these locations may be serviced as LED modules rather than simple replaceable bulbs.
How do I verify the right bulb for my 2018 Audi S5?
Start by identifying the exact lighting position, such as low beam, rear turn signal, or glove box light. Then compare that position with the bulb chart for the 2018 S5. This page is organized by location so you can confirm the correct fit before ordering a replacement.
Are the headlight high beam and low beam bulbs replaceable separately on this model?
The chart lists the headlight high beam and low beam as LED on the 2018 Audi S5. In many LED setups, the light source is integrated into the headlamp assembly, so replacement may involve the full unit or a specific service part rather than a standard halogen-style bulb.
What bulb does the 2018 Audi S5 use for the glove box light?
The chart lists the glove box light bulb as 2821. If your car has this feature, confirm the installed bulb before purchase, since interior lighting can vary with trim and equipment.
Are the dome light, map light, and vanity mirror lights all the same on the 2018 S5?
They are all listed as LED in the bulb chart, but that does not always mean they use the same physical part or the same service method. Check each location separately, because cabin lighting can differ between the dome, map, vanity mirror, and other interior positions.
Can I replace the brake light bulbs with standard halogen bulbs?
No, not if your 2018 Audi S5 is equipped with LED brake lights. The chart identifies the brake light bulb as LED, so a halogen bulb is not a direct fit and may not function correctly in the original housing.
Do front and rear turn signal bulbs use the same type?
Both the front and rear turn signal light bulbs are listed as LED on the 2018 Audi S5. Even so, the front and rear assemblies may be different in design, so it is best to confirm the exact position before ordering.
What should I know about the license plate lights on the 2018 Audi S5?
The license plate light bulbs are listed as LED. These are usually small exterior lamps, but the exact replacement method can vary by body style and market, so check the installed setup if you are unsure.
Are the side marker and cornering lights part of the same system?
The chart lists front and rear side marker lights as LED, and it also lists a cornering light as LED. These are separate lighting positions, so each one should be checked individually when you are looking up fitment for the 2018 S5.
What if my 2018 Audi S5 has a lighting package that differs from the chart?
That can happen. Trim level, lighting package, and market differences can change the bulb setup. If your car does not match the chart exactly, inspect the installed bulb or lamp assembly and compare it with the vehicle’s equipment before buying replacements.
Can I use this page for both coupe and Sportback versions of the 2018 S5?
This page is a helpful starting point for the 2018 Audi S5, but body style can affect some lighting details. Always confirm the exact lamp position and inspect the vehicle if you are working on a coupe, Sportback, or a market-specific version.
What is the best way to avoid buying the wrong bulb for my 2018 Audi S5?
Use the bulb position first, then verify whether the light is LED or a replaceable bulb. If possible, remove the old bulb or inspect the lamp assembly before ordering. That is especially important for optional lighting, interior lamps, and any position that may vary by trim or market.