What is the low beam headlight bulb size for a 2005 Audi S4 Cabriolet?

The 2005 Audi S4 Cabriolet uses a H7 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2005 Audi S4 Cabriolet?

The high beam bulb size for the 2005 Audi S4 Cabriolet is H9.

Why are my 2005 Audi S4 Cabriolet headlights dim?

Dim headlights on a 2005 Audi S4 Cabriolet can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H7 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2005 Audi S4 Cabriolet fog light?

The 2005 Audi S4 Cabriolet uses a H11 bulb for the fog light position.

Is the 2005 Audi S4 Cabriolet single or dual beam?

The 2005 Audi S4 Cabriolet uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2005 Audi S4 Cabriolet?

Yes, the 2005 Audi S4 Cabriolet comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H7 LED conversion kit for the low beams.

Does the 2005 Audi S4 Cabriolet have fog lights?

Yes, the 2005 Audi S4 Cabriolet takes a H11 bulb for the fog light position.

Did the 2005 Audi S4 Cabriolet change headlight bulb sizes from the previous year?

Yes — the 2005 Audi S4 Cabriolet uses different bulb sizes than the 2004 model. The 2005 generation introduced this bulb configuration.

Is the 2005 Audi S4 Cabriolet the first or last year to use H7 bulbs?

The 2005 Audi S4 Cabriolet is the only year in the 2005 generation to use the H7 bulb for the low beam headlight.

How do I change the headlight on a 2005 Audi S4 Cabriolet?

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 H7 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 2005 Audi S4 Cabriolet?

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 H7 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 2005 Audi S4 Cabriolet headlights?

A pair of halogen H7 bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. 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 2005 Audi S4 Cabriolet?

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 H7 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 2005 Audi S4 Cabriolet has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2005 Audi S4 Cabriolet

What Size Bulbs Does a 2005 Audi S4 Cabriolet Use?

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

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2005 Audi S4 Cabriolet Have?

Lighting on the 2005 Audi S4 Cabriolet is managed by a total of 8 bulbs, covering everything from primary headlights to signal indicators. It features a comprehensive lighting system powered by a dual-bulb halogen configuration using separate H7 low beam and H9 high beam bulbs for precise light distribution. 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 2005 Audi S4 Cabriolet?

Upgrading to LED is one of the most effective ways to modernize your Audi's appearance and safety profile. We recommend starting your upgrade with the H7 low beams, as they see the most use. Adding a matching H9 LED kit later will complete the look and ensure consistent lighting performance. Because Audi utilizes a CANbus system, standard LED bulbs may cause "bulb out" errors on your dashboard. Always opt for "Error-Free" or CANbus-ready kits which include the necessary resistors. Don't forget the H11 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2005 Audi S4 Cabriolet Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H7	Buy H7 →
Fog Light	H11	Buy H11 →
High Beam	H9	Buy H9 →
Side Marker	3457NA	Buy 3457NA →
Turn Signal Rear	7507	Buy 7507 →
Parking Light	3457NA	Buy 3457NA →
Door Light	W5W	Buy W5W →
Trunk Light	W5W	Buy W5W →

How do the 2005 Audi S4 Cabriolet's bulbs compare to other years?

The 2005 Audi S4 Cabriolet changed bulb sizes from 2004. The previous model year used a different configuration.

The 2006 model switched to a different bulb configuration.

This bulb configuration covers the 2005 model years. ← 2004 2006 →

Finding the best installation guide...

Other S4 Cabriolet Years

2006 2004

Other Vehicles That Use H7 Bulbs

2022 Alfa Romeo Stelvio 2022 Mercedes-Benz Sprinter 1500 2022 Mercedes-Benz Sprinter 2500 2022 Mercedes-Benz Sprinter 3500 2022 RAM ProMaster 1500 2022 RAM ProMaster 2500

H7 Comparisons

9005 vs H7 H1 vs H7 H11 vs H7 H4 vs H7