What is the low beam headlight bulb size for a 1993 Audi 90 Quattro?

The 1993 Audi 90 Quattro uses a H4 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1993 Audi 90 Quattro?

The high beam bulb size for the 1993 Audi 90 Quattro is N/A.

Why are my 1993 Audi 90 Quattro headlights dim?

Dim headlights on a 1993 Audi 90 Quattro can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H4 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1993 Audi 90 Quattro fog light?

The 1993 Audi 90 Quattro uses a H1 bulb for the fog light position.

Is the 1993 Audi 90 Quattro single or dual beam?

The 1993 Audi 90 Quattro uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1993 Audi 90 Quattro?

Yes, the 1993 Audi 90 Quattro comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H4 LED conversion kit for the low beams.

Does the 1993 Audi 90 Quattro have fog lights?

Yes, the 1993 Audi 90 Quattro takes a H1 bulb for the fog light position.

Did the 1993 Audi 90 Quattro change headlight bulb sizes from the previous year?

Yes — the 1993 Audi 90 Quattro uses different bulb sizes than the 1992 model. The 1993 generation introduced this bulb configuration.

Is the 1993 Audi 90 Quattro the first or last year to use H4 bulbs?

The 1993 Audi 90 Quattro is the only year in the 1993 generation to use the H4 bulb for the low beam headlight.

How do I change the headlight on a 1993 Audi 90 Quattro?

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 H4 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 1993 Audi 90 Quattro?

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 H4 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 1993 Audi 90 Quattro headlights?

A pair of halogen H4 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 1993 Audi 90 Quattro?

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 H4 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 1993 Audi 90 Quattro has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1993 Audi 90 Quattro

What Size Bulbs Does a 1993 Audi 90 Quattro 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 1993 Audi 90 Quattro Have?

Lighting on the 1993 Audi 90 Quattro 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 H4 low beam and 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 1993 Audi 90 Quattro?

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 H4 low beams, as they see the most use. Adding a matching 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 H1 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1993 Audi 90 Quattro Bulb Size Chart

Position	Bulb Size	Shop
Side Marker	7528	Buy 7528 →
Turn Signal Front	7528	Buy 7528 →
Fog Light	H1	Buy H1 →
Low Beam	H4	Buy H4 →
Parking Light	7528	Buy 7528 →
Tail Light	7528	Buy 7528 →
License Plate	3893	Buy 3893 →
Brake Light	7528	Buy 7528 →

How do the 1993 Audi 90 Quattro's bulbs compare to other years?

The 1993 Audi 90 Quattro changed bulb sizes from 1992. The previous model year used a different configuration.

The 1994 model switched to a different bulb configuration.

This bulb configuration covers the 1993 model years. ← 1992 1994 →

Finding the best installation guide...

Other 90 Quattro Years

1995 1994 1992 1991 1990 1989 1988

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