Audi S8 2018 Bulb Size
Bulb size chart
This page covers bulb fitment for the 2018 Audi S8 and is organized by lighting position so you can verify the correct bulb size before ordering. Because the S8 uses a mix of LED exterior and interior lighting, checking the exact location matters more than just searching by model name alone.
Use the listings here to match the bulb type to each lamp on the car, including headlights, brake lights, turn signals, interior lights, and cargo-area lighting. That makes it easier to confirm what your vehicle uses and avoid buying the wrong replacement for a specific socket or housing.
Fitment can vary by market, trim, body style, and lighting package, so it is smart to compare this page with the bulb already installed in your 2018 Audi S8 before buying anything. Many exterior positions on this car are LED from the factory, while some interior positions use 2825/98-style bulbs, and aftermarket LED conversions may change the required bulb or create compatibility issues. If your S8 has been modified or repaired, check the actual lamp assembly and connector style as well as the bulb itself. When in doubt, remove the old bulb and match it by shape, base, and wattage before placing an order.
FAQ
Does the 2018 Audi S8 use LED bulbs for most exterior lights?
Yes. The bulb chart for the 2018 Audi S8 shows LED lighting for the main exterior positions, including the headlights, brake lights, turn signals, tail lights, daytime running lights, license plate lights, and reverse lights.
Why should I check bulb size by lighting position instead of only by year and model?
Different lighting positions on the same vehicle can use different bulb types. On the 2018 Audi S8, interior lamps and a few smaller courtesy lights may use different bulbs than the exterior LED assemblies, so matching by location helps prevent ordering the wrong part.
What bulb does the glove box light use on the 2018 Audi S8?
The glove box light is listed as 2825, 98 for this model year.
What bulb does the interior door light use on the 2018 Audi S8?
The interior door light is listed as 2825, 98 for this model year.
Are the headlight high beam and low beam bulbs separate on this page?
The page lists the headlight high beam and low beam as LED. If you are replacing a headlight issue on a 2018 Audi S8, verify whether the problem is in the LED module, the housing, or the electrical control system rather than assuming a standard replaceable halogen bulb.
Can I swap the factory LED bulbs for aftermarket halogen bulbs?
Usually no. If the car was built with LED lighting in a given position, the housing and electronics are designed for that setup. A halogen swap is generally not a direct replacement and may not fit or function correctly.
What should I do before buying a replacement bulb for the trunk or cargo area light?
Check the bulb already installed, confirm the socket style, and compare it with the listing for the trunk or cargo area light on this page. Even interior lights can vary with trim or package differences.
Do trim level and lighting package affect bulb fitment on the 2018 Audi S8?
Yes. Trim and lighting package can vary by market and body style, and that can change the bulb used in certain positions. Always verify the exact lamp on your vehicle, especially for interior and courtesy lighting.
Are the front and rear turn signal bulbs the same on the 2018 Audi S8?
Both front and rear turn signal positions are listed as LED on this page, but that does not always mean the same physical part is used in both locations. Check the specific lamp position before ordering.
What about the fog light rear and cornering light positions?
Those positions are also listed on the page and shown as LED for the 2018 Audi S8. Because these functions can be part of a larger lamp assembly, it is important to confirm the exact configuration on the car.
How can I avoid buying the wrong bulb for my 2018 Audi S8?
Use the bulb chart by position, inspect the installed bulb if possible, and compare the base, connector, and housing style before purchase. This is especially important on LED-equipped Audi models where the replacement may be a module rather than a simple bulb.
Is this page useful if my S8 has aftermarket lighting changes?
Yes, but with caution. Aftermarket conversions can change the original bulb type or create nonstandard fitment, so the best approach is to inspect the actual part in the vehicle rather than relying only on the factory listing.