Audi A4 2006 Bulb Size
Bulb size chart
This 2006 Audi A4 bulb size guide helps you verify the correct bulbs by lighting position, so you can match the right part before you buy. Because Audi used different lighting setups across trims, body styles, and markets, checking the exact lamp location is the safest way to confirm fitment for your car.
Use this page as a quick reference for exterior and interior lighting on the 2006 Audi A4, including headlights, tail lights, turn signals, parking lights, reverse lights, license plate lights, and cabin bulbs. If your A4 has halogen, HID, or Cabriolet-specific lighting, the bulb type can change, so the position-based chart is especially useful.
Fitment on the 2006 Audi A4 can vary by trim package, body style, and lighting equipment, so always compare your vehicle’s existing bulb to the listing before ordering. Halogen and HID headlight systems use different bulbs, and some aftermarket LED replacements may fit physically but still need the correct beam pattern, polarity, or resistor setup to work properly. If you are converting from halogen to LED, make sure the bulb is compatible with the housing and local road-use rules. When possible, remove the installed bulb first and verify the base, connector, and markings so you do not rely on appearance alone.
FAQ
What bulb does the 2006 Audi A4 use for the low beam headlights on halogen models?
Base 2006 Audi A4 models with halogen headlights use H7 low beam bulbs.
What bulb fits the high beam headlights on a base 2006 Audi A4 with halogen headlights?
The base model with halogen headlights uses H7 bulbs for the high beam.
Which low beam bulb is used on 2006 Audi A4 models with HID headlights?
Base models with HID headlights use D1S low beam bulbs, while Cabriolet models with HID headlights use D2S low beam bulbs.
What is the front fog light bulb size for the 2006 Audi A4?
Front fog light bulbs are listed as H11 LED or H16 LED, depending on the specific setup.
What bulb is used for the front turn signals on the 2006 Audi A4?
The front outer turn signal bulb is 2827, and the front inner turn signal bulb is also 3457A on this page.
What bulb fits the parking lights and front side marker lights?
The parking light bulb is 3457A, and the front side marker light bulb is also 3457A.
What bulb does the 2006 Audi A4 use for the daytime running lights and reverse lights?
Both the daytime running light bulb and the back up reverse light bulb are listed as 7506.
What bulb fits the rear turn signal on the 2006 Audi A4?
The rear turn signal light bulb is 7507.
What bulb is used for the base model brake lights and tail lights?
For the base model, the brake light bulb is 7506R and the tail light bulb is 5007.
What bulbs are used for the Cabriolet brake and tail lights?
The Cabriolet uses 7225 bulbs for both the brake light and tail light positions listed on this page.
What bulb sizes are used for interior lights on the 2006 Audi A4?
Interior positions on this page include 2825, 98 for the glove box, trunk or cargo area, interior door light, stepwell light, and certain Cabriolet courtesy light applications. Other interior positions include 6418 for the vanity mirror and courtesy light, and 64111 for the map light.
What bulb is used for the license plate lights?
The license plate light bulb is 6418.
Why does the bulb chart mention Cabriolet and base model separately?
The 2006 Audi A4 Cabriolet can use different bulbs than the base sedan or wagon-style applications, especially for headlights, brake lights, tail lights, and courtesy lighting.
Should I check the installed bulb before buying a replacement?
Yes. Checking the installed bulb is the best way to confirm the base, size, and exact fit, especially if your A4 has been modified or if the lighting package differs from the standard setup.