Audi A4 2004 Bulb Size
Bulb size chart
This 2004 Audi A4 bulb size page helps you verify the correct bulb by lighting position, so you can match the right fit before you buy. Because Audi used different lighting setups by body style and trim, the exact bulb can change between Base, Avant, and Cabriolet models, as well as between halogen and HID headlight packages.
Use the bulb chart on this page to check each exterior and interior light one by one, including headlights, turn signals, brake lights, license plate lights, dome lights, and cargo-area lamps. That makes it easier to confirm the correct replacement for your specific 2004 Audi A4 and avoid ordering the wrong size.
Fitment on the 2004 Audi A4 can vary by market, trim package, and lighting option, so always compare the bulb position on the car with the chart before purchasing. Halogen and HID systems use different low-beam bulbs, and some fog light or daytime running light setups may also differ depending on the body style. If you are considering aftermarket LED conversions, check beam pattern, polarity, and local road-use rules, since not every LED replacement will perform the same as the original halogen or HID bulb. The safest approach is to remove the installed bulb first and confirm the number printed on the base or glass before ordering replacements.
FAQ
What does this 2004 Audi A4 bulb size page help me confirm?
It helps you match the correct bulb size to each light position on the car, such as low beam, high beam, turn signal, brake light, license plate light, and interior lamps.
Do all 2004 Audi A4 models use the same bulb sizes?
No. Bulb sizes can differ by body style and trim, especially between Base, Avant, and Cabriolet versions, and also by lighting package and market.
Which low beam bulb does the 2004 Audi A4 Avant with halogen headlights use?
The 2004 Audi A4 Avant with halogen headlights uses an H7 low beam bulb.
Which low beam bulb does the 2004 Audi A4 Avant with HID headlights use?
The 2004 Audi A4 Avant with HID headlights uses a D1S low beam bulb.
Which low beam bulb does the 2004 Audi A4 Cabriolet with HID headlights use?
The 2004 Audi A4 Cabriolet with HID headlights uses a D2S low beam bulb.
What bulb is listed for the front turn signal on the 2004 Audi A4?
The front outer turn signal bulb is listed as 2827, and the front inner turn signal bulb is listed as 3457A.
What bulb is used for the rear turn signal on this A4?
The rear turn signal bulb is listed as 7507.
What bulb fits the license plate lights on the 2004 Audi A4?
The license plate light bulb is listed as 6418.
What bulb size is used for the dome light and map light?
The dome light bulb is listed as 6411 or 6428, and the map light bulb is listed as 64111.
Which bulb is used for the glove box, interior door, and stepwell lights?
Those interior positions are listed with 2825 or 98 bulbs.
What bulb does the 2004 Audi A4 use for the reverse light?
The back up reverse light bulb is listed as 7506.
What should I check before buying replacement bulbs for my 2004 Audi A4?
Check the exact light position, body style, and headlight type on your car, then compare the installed bulb number with the chart. This is especially important if your A4 has halogen headlights, HID headlights, Avant-specific lamps, or Cabriolet-specific lighting.
Can I switch my 2004 Audi A4 bulbs to LED?
Some positions may accept LED replacements, but fitment and performance depend on the housing, connector, and beam pattern. For example, LED fog light or interior bulb conversions may work well, but you should still verify the exact bulb size and check for proper operation after installation.