What is the low beam headlight bulb size for a 2004 Audi A6 Avant?

The 2004 Audi A6 Avant uses a HID-D2S LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2004 Audi A6 Avant?

The high beam bulb size for the 2004 Audi A6 Avant is H7 LED.

Why are my 2004 Audi A6 Avant headlights dim?

Dim headlights on a 2004 Audi A6 Avant can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D2S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2004 Audi A6 Avant fog light?

The 2004 Audi A6 Avant uses a H3 LED bulb for the fog light position.

Is the 2004 Audi A6 Avant single or dual beam?

The 2004 Audi A6 Avant uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2004 Audi A6 Avant?

Yes, the 2004 Audi A6 Avant comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D2S LED LED conversion kit for the low beams.

Does the 2004 Audi A6 Avant have fog lights?

Yes, the 2004 Audi A6 Avant takes a H3 LED bulb for the fog light position.

Did the 2004 Audi A6 Avant change headlight bulb sizes from the previous year?

No — the 2004 Audi A6 Avant uses the same bulb sizes as the 2003 model. This configuration has been consistent across the 2002–2004 generation.

Is the 2004 Audi A6 Avant the first or last year to use HID-D2S LED bulbs?

The 2004 Audi A6 Avant is the last year in the 2002–2004 generation to use the HID-D2S LED bulb for the low beam headlight.

How do I change the headlight on a 2004 Audi A6 Avant?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old HID-D2S LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. Note: Audi vehicles use a CANbus system, so LED replacements may need an anti-flicker decoder. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2004 Audi A6 Avant?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved HID-D2S LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2004 Audi A6 Avant headlights?

A pair of HID HID-D2S LED bulbs costs $50 to $150. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2004 Audi A6 Avant?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the HID-D2S LED position are available as direct plug-and-play replacements. Since the Audi uses CANbus monitoring, choose a CANbus-compatible LED kit to avoid dashboard errors.

The 2004 Audi A6 Avant is the last model year to use this bulb configuration (2002–2004).

Fitment Guaranteed for 2004 Audi A6 Avant

What Size Bulbs Does a 2004 Audi A6 Avant Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2004 Audi A6 Avant Have?

The 2004 Audi A6 Avant utilizes a refined lighting configuration featuring 15 distinct bulb positions. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D2S projector housings for high-intensity output. Note that Audi vehicles typically feature a CANbus electrical monitor that checks for specific bulb resistance.

LED Flicker Warning

This vehicle is known to use a CANbus system. Installing standard LEDs may cause flickering.

Use a CANbus decoder.

Can You Put LED Bulbs in a 2004 Audi A6 Avant?

The 2004 Audi A6 Avant is already equipped with factory D2S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H3 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2004 Audi A6 Avant Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D2S LED	Buy HID-D2S LED →
High Beam	H7 LED	Buy H7 LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	2723	Buy 2723 →
Dome Light	6411	Buy 6411 →
Turn Signal Front	2827	Buy 2827 →
Side Marker	7528	Buy 7528 →
License Plate	6418	Buy 6418 →
Map Light	47830	Buy 47830 →
Parking Light	2825	Buy 2825 →
Turn Signal Rear	7506	Buy 7506 →
Reverse Light	7506	Buy 7506 →
Trunk Light	6486X	Buy 6486X →
Tail Light	7528	Buy 7528 →
Door Light	W5W	Buy W5W →

How do the 2004 Audi A6 Avant's bulbs compare to other years?

The 2004 Audi A6 Avant uses the same bulbs as the 2003 model.

This bulb configuration covers the 2002–2004 model years. ← 2003

Finding the best installation guide...

Other A6 Avant Years

2003 2002 2001 2000 1999

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