Audi A6 2004 Bulb Size
Bulb size chart
This page helps you verify bulb sizes for the 2004 Audi A6 by lighting position, so you can match the correct bulb to the exact lamp on the car. Because trim and lighting equipment can vary by market and body style, it is always smart to confirm the position before ordering.
Use the bulb chart below as a quick reference for exterior, interior, and cargo-area lighting on the 2004 Audi A6. It covers common fitments such as low beam, high beam, turn signals, brake lights, license plate lights, and cabin bulbs, making replacement easier and reducing the chance of buying the wrong part.
Fitment can differ between trims, lighting packages, and regional versions of the 2004 Audi A6, so the bulb listed for one car may not match every vehicle. This is especially important when comparing halogen and LED replacements, since aftermarket LED conversions may need additional hardware, can change beam pattern, and may not be legal in every use case. Before you buy, check the bulb currently installed in your car, compare the base and connector style, and confirm whether your A6 uses the standard bulb listed here or an alternate setup from a previous repair or retrofit.
FAQ
What low beam bulb does a 2004 Audi A6 use?
The listed low beam bulb for the 2004 Audi A6 is D2S. Always confirm the headlamp type on your specific car before ordering, since trim and market differences can affect fitment.
What high beam bulb fits the 2004 Audi A6?
The high beam bulb listed for this model year is H1. If one side has been modified or replaced before, check the installed bulb to make sure it matches the original socket and connector.
Which fog light bulb is used on the 2004 Audi A6?
Front fog light fitment is listed as H3C or H3 depending on the vehicle configuration. Because the page notes optional variations, verify the bulb already in the fog lamp housing before purchasing.
What bulb does the front outer turn signal use?
The front outer turn signal bulb is listed as 2827 on the 2004 Audi A6. This is a separate fitment from the front inner turn signal, so do not assume both sides use the same bulb.
What is the front inner turn signal bulb size?
The front inner turn signal bulb is listed as 3457A. This helps distinguish it from the outer signal bulb, which uses a different part number.
What bulb fits the rear turn signal on this A6?
The rear turn signal bulb is listed as 7506. If the signal is dim or intermittent, replace the bulb and inspect the socket for heat damage or corrosion.
What bulb is used for the brake lights and tail lights?
The brake light bulb and tail light bulb are both listed as 7528. The rear side marker light is also listed as 7528, so it is important to match the correct lamp position when replacing bulbs.
What bulb size is used for the license plate lights?
The license plate light bulb for the 2004 Audi A6 is 6418. This same bulb number is also listed for several interior and cargo-area positions on this vehicle.
Which interior bulbs use 6418 on the 2004 Audi A6?
The 6418 bulb is listed for the vanity mirror light, glove box light, trunk or cargo area light, stepwell light, and one courtesy light option. It is a common interior fitment on this model year.
What dome light bulb does the 2004 Audi A6 use?
The dome light bulb is listed as 6411 or 6428. The engine compartment light also uses 6411 or 6428, so check the existing bulb if you are replacing either location.
What is the map light bulb size?
The map light bulb is listed as 64111. If your overhead console has been changed or repaired, compare the installed bulb to the chart before ordering.
What bulb fits the center high mount stop light?
The center high mount stop light bulb is listed as 2723. This is the third brake light, so it is separate from the main brake and tail lamp bulbs in the rear housings.
Do trim and lighting packages affect bulb fitment on the 2004 Audi A6?
Yes. Trim level, lighting package, body style, and market can all change the bulb used in a given position. That is why this page is organized by lighting position rather than by a single universal bulb list.
Should I check the installed bulb before buying replacements?
Yes. Checking the installed bulb is the best way to confirm fitment, especially if the car has aftermarket parts, prior repairs, or LED conversions. Matching the bulb base and connector style can prevent returns and installation issues.