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Audi S8 2003 Bulb Size
Bulb size chart
Fog Light Bulb Front - H3, H3C
Headlight Bulb Low Beam(with halogen headlights) - H1
Headlight Bulb Low Beam(with HID headlights) - D2S
Back Up Reverse Light Bulb - 7506
Brake Light Bulb - 7528
Center High Mount Stop Light Bulb - 2825, 98
License Plate Light Bulb - 6418
Parking Light Bulb - 2825, 98
Side Marker Light Bulb Front - 2357A
Side Marker Light Bulb Rear - 5007
Stepwell Light Bulb - 6418
Tail Light Bulb Inner - 5007
Tail Light Bulb Outer - 7528
Turn Signal Light Bulb Front Inner - 2357A
Turn Signal Light Bulb Front Outer - 2827
Turn Signal Light Bulb Rear - 7506
Ash Tray Light Bulb - 2723
Courtesy Light Bulb - 2825, 98
Dome Light Bulb - 6411, 6428
Glove Box Light Bulb - 3893
Interior Door Light Bulb - 6418
Map Light Bulb - 64111
Reading Light Bulb Rear - 6486X
Trunk or Cargo Area Light - 6418
Vanity Mirror Light Bulb - 6418
H3 Bulbs
Used for: Fog Light Bulb Front
H3C Bulbs
Used for: Fog Light Bulb Front
H1 Bulbs
Used for: Headlight Bulb Low Beam(with halogen headlights)
D2S Bulbs
Used for: Headlight Bulb Low Beam(with HID headlights)
7506 Bulbs
Used for: Back Up Reverse Light Bulb, Turn Signal Light Bulb Rear
7528 Bulbs
Used for: Brake Light Bulb, Tail Light Bulb Outer
2825 Bulbs
Used for: Center High Mount Stop Light Bulb, Parking Light Bulb, Courtesy Light Bulb
98 Bulbs
Used for: Center High Mount Stop Light Bulb, Parking Light Bulb, Courtesy Light Bulb
6418 Bulbs
Used for: License Plate Light Bulb, Stepwell Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light, Vanity Mirror Light Bulb
2357A Bulbs
Used for: Side Marker Light Bulb Front, Turn Signal Light Bulb Front Inner
5007 Bulbs
Used for: Side Marker Light Bulb Rear, Tail Light Bulb Inner
2827 Bulbs
Used for: Turn Signal Light Bulb Front Outer
2723 Bulbs
Used for: Ash Tray Light Bulb
6411 Bulbs
Used for: Dome Light Bulb
6428 Bulbs
Used for: Dome Light Bulb
3893 Bulbs
Used for: Glove Box Light Bulb
64111 Bulbs
Used for: Map Light Bulb
6486X Bulbs
Used for: Reading Light Bulb Rear
This 2003 Audi S8 bulb guide helps you verify the correct bulb sizes by lighting position, so you can replace a failed lamp with the right fit the first time. Because the S8 could be equipped with different lighting setups, the exact bulb used on your car may depend on the headlight type, market, and body style.
Use this page as a quick reference for exterior and interior bulbs on the 2003 Audi S8. From low beams and fog lights to license plate, dome, and trunk lights, the chart is organized by location to make comparison and replacement easier.
Before buying, confirm your trim and lighting package, since fitment can vary between halogen and HID-equipped cars and between regional specifications. Aftermarket LED conversions may change bulb type, beam pattern, or warning behavior, so match the bulb to the original socket and function rather than relying on appearance alone. If possible, remove the installed bulb and compare it before ordering, especially for exterior lamps and any interior bulb that may have been replaced previously.
FAQ
What low beam bulb does a 2003 Audi S8 use?
The 2003 Audi S8 uses H1 low beam bulbs with halogen headlights and D2S low beam bulbs with HID headlights. Check your headlight housing before ordering, because the correct bulb depends on the factory setup.
How do I know whether my S8 has halogen or HID headlights?
Look at the headlight assembly and the bulb base, or check the original equipment on the car. The bulb chart for this year lists H1 for halogen low beams and D2S for HID low beams, so the installed setup determines the replacement.
What bulb fits the front fog lights on a 2003 Audi S8?
Front fog light fitment is listed as H3C or H3. Because both are shown for this model year, it is important to verify the bulb currently installed in your car before purchasing.
What are the front turn signal bulb sizes on the 2003 Audi S8?
The front inner turn signal bulb is listed as 2357A, while the front outer turn signal bulb is listed as 2827. These are separate positions, so do not assume both sides use the same bulb.
What bulb is used for the rear turn signals and reverse lights?
Both the rear turn signal light and the back up reverse light are listed as 7506 bulbs on the 2003 Audi S8. That makes it easier to keep the correct spare on hand for rear lighting repairs.
Which bulb fits the brake and outer tail lights?
The brake light bulb and the outer tail light bulb are both listed as 7528. If one of these fails, you can use the same bulb size for either position on this model year.
What bulb does the inner tail light use on the 2003 Audi S8?
The inner tail light bulb is listed as 5007. The rear side marker light also uses 5007, so the same bulb size appears in more than one rear lighting position.
What bulb size is used for the side marker lights?
The front side marker light bulb is listed as 2357A and the rear side marker light bulb is listed as 5007. Front and rear markers are different on this vehicle, so check the location carefully.
What interior bulbs are listed for the 2003 Audi S8?
Interior bulb positions include the dome light with 6411 or 6428, the map light with 64111, the license plate light with 6418, and several cabin locations such as the vanity mirror, trunk or cargo area, interior door light, stepwell light, and ash tray light. The glove box light is listed as 3893.
Can I replace the bulbs with LEDs on my 2003 Audi S8?
Yes, many owners choose LED replacements, but fitment and compatibility can vary. Make sure the LED matches the original bulb size, and be aware that some positions may need additional attention for beam pattern, dimming, or warning messages.
Why does the bulb chart mention that trim and lighting package can vary?
Audi used different lighting combinations by market and body style, and some cars may have had optional equipment. That is why the page is organized by lighting position and why checking the installed bulb is the safest way to confirm fitment.