Audi A4 2008 Bulb Size
Bulb size chart
This 2008 Audi A4 bulb size guide helps you verify the correct bulbs by lighting position, so you can replace the right lamp without guesswork. Whether you are changing a headlight, interior bulb, or exterior signal light, using the correct fitment makes the job faster and helps avoid mismatched parts.
The 2008 Audi A4 uses a mix of HID, halogen-style, and small wedge or festoon-style bulbs depending on the lamp location. Because trim level, lighting package, market, and body style can change the exact setup, it is smart to confirm each bulb by position before ordering replacements.
For best results, compare this page with the bulb already installed in your car, especially if your A4 has been modified or fitted with aftermarket lighting. Some positions may differ between halogen and LED conversions, and fog light or interior lighting upgrades can affect the bulb type you need. If your car has a different trim or package, the listed bulb size may still vary slightly, so checking the old bulb before purchase is the safest way to avoid returns and fitment issues.
FAQ
What bulb does the 2008 Audi A4 use for the low beam and high beam headlights?
The listed headlight bulb for both high beam and low beam is D1S. This applies to the 2008 Audi A4 on this page, but you should still confirm the existing bulb type if your car has been modified.
What is the front fog light bulb size on a 2008 Audi A4?
Front fog light fitment is listed as H11 LED or H16 LED. The exact option can depend on the vehicle setup, so check the installed bulb or housing before buying.
Which bulb is used for the front turn signal on the 2008 Audi A4?
The front turn signal bulb is 7506. This same bulb type is also listed for several other signal and reverse light positions on this page.
What bulb does the daytime running light use on this model year?
The daytime running light bulb is listed as 7506 for the 2008 Audi A4. If the DRL system has been changed to LED, the original bulb size may no longer match the installed part.
What is the rear turn signal bulb size for the 2008 Audi A4?
The rear turn signal bulb is 7506. Always verify the lamp position carefully, since rear lighting assemblies can vary by market and body style.
What bulb fits the back up reverse light?
The back up reverse light bulb is 7506. If only one side is out, it is still a good idea to compare both sides for wear or previous replacement.
What bulb is used for the brake light?
The brake light bulb is listed as 7506R. That designation is specific to the brake light position on this page for the 2008 Audi A4.
What is the license plate light bulb size?
The license plate light bulb is 6418. This is a common small bulb size used in several interior and exterior courtesy-style applications.
What bulb fits the dome light and map light?
The dome light bulb is listed as 6411 or 6428, while the map light bulb is 64111. These are separate positions, so do not assume they use the same bulb.
What bulb is used for the glove box, courtesy, and stepwell lights?
Those positions are listed with 2825 or 98 bulb types. The same family also appears for the parking light, interior door light, side marker light front, and courtesy light on this page.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light uses a 6418 bulb. That same bulb is also listed for the vanity mirror light and license plate light.
Do all 2008 Audi A4 trims use the same bulb sizes?
Not always. Trim, lighting package, market, and body style can change the exact bulb fitment, so the bulb chart should be used as a guide and the installed bulb should be checked before ordering.