What is the low beam headlight bulb size for a 2001 Audi S4?

The 2001 Audi S4 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 2001 Audi S4?

The high beam bulb size for the 2001 Audi S4 is H7 LED.

Why are my 2001 Audi S4 headlights dim?

Dim headlights on a 2001 Audi S4 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 2001 Audi S4 fog light?

The 2001 Audi S4 uses a H7 LED bulb for the fog light position.

Is the 2001 Audi S4 single or dual beam?

The 2001 Audi S4 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2001 Audi S4?

Yes, the 2001 Audi S4 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 2001 Audi S4 have fog lights?

Yes, the 2001 Audi S4 takes a H7 LED bulb for the fog light position.

Did the 2001 Audi S4 change headlight bulb sizes from the previous year?

Yes — the 2001 Audi S4 uses different bulb sizes than the 2000 model. The 2001 generation introduced this bulb configuration.

Is the 2001 Audi S4 the first or last year to use HID-D2S LED bulbs?

The 2001 Audi S4 is the only year in the 2001 generation to use the HID-D2S LED bulb for the low beam headlight.

How do I change the headlight on a 2001 Audi S4?

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 2001 Audi S4?

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 2001 Audi S4 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 2001 Audi S4?

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 2001 Audi S4 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2001 Audi S4

What Size Bulbs Does a 2001 Audi S4 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 2001 Audi S4 Have?

Owners of the 2001 Audi S4 will find a total of 15 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D2S projector housings for high-intensity output. This model belongs to the mid years of the S4's 1992-2020 production span. 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 2001 Audi S4?

The 2001 Audi S4 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 H7 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2001 Audi S4 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	H7 LED	Buy H7 LED →
Brake Light	70 LED	Buy 70 LED →
Side Marker	7528 LED	Buy 7528 LED →
Turn Signal Front	2827 LED	Buy 2827 LED →
Turn Signal Rear	7528 LED	Buy 7528 LED →
Dome Light	6411	Buy 6411 →
License Plate	6418	Buy 6418 →
Map Light	47830	Buy 47830 →
Parking Light	64132	Buy 64132 →
Reverse Light	7506	Buy 7506 →
Trunk Light	6418	Buy 6418 →
Tail Light	7528	Buy 7528 →
Door Light	W5W	Buy W5W →

How do the 2001 Audi S4's bulbs compare to other years?

The 2001 Audi S4 changed bulb sizes from 2000. The previous model year used a different configuration.

The 2002 model switched to a different bulb configuration.

This bulb configuration covers the 2001 model years. ← 2000 2002 →

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Other S4 Years

2020 2019 2018 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2002 2000 1994 1993 1992

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