What is the low beam headlight bulb size for a 1981 Audi Coupe?

The 1981 Audi Coupe uses a H4656 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1981 Audi Coupe?

The high beam bulb size for the 1981 Audi Coupe is H4651.

Why are my 1981 Audi Coupe headlights dim?

Dim headlights on a 1981 Audi Coupe can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H4656 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1981 Audi Coupe fog light?

The 1981 Audi Coupe typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 1981 Audi Coupe single or dual beam?

The 1981 Audi Coupe uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1981 Audi Coupe?

Yes, the 1981 Audi Coupe comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H4656 LED conversion kit for the low beams.

How do I change the headlight on a 1981 Audi Coupe?

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 H4656 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 1981 Audi Coupe?

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 H4656 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 1981 Audi Coupe headlights?

A pair of halogen H4656 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 1981 Audi Coupe?

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 H4656 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 1981 Audi Coupe has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1981 Audi Coupe

What Size Bulbs Does a 1981 Audi Coupe 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 1981 Audi Coupe Have?

Lighting on the 1981 Audi Coupe is managed by a total of 6 bulbs, covering everything from primary headlights to signal indicators. It features a standard lighting system powered by a dual-bulb halogen configuration using separate H4656 low beam and H4651 high beam bulbs for precise light distribution. This model belongs to the early years of the Coupe's 1981-1991 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 1981 Audi Coupe?

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 H4656 low beams, as they see the most use. Adding a matching H4651 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.

1981 Audi Coupe Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H4656	Buy H4656 →
Turn Signal Front	7528	Buy 7528 →
High Beam	H4651	Buy H4651 →
Side Marker	3893	Buy 3893 →
License Plate	3893	Buy 3893 →
Parking Light	7528	Buy 7528 →

How do the 1981 Audi Coupe's bulbs compare to other years?

The 1982 model switched to a different bulb configuration.

This bulb configuration covers the 1981 model years. 1982 →

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Other Coupe Years

1991 1990 1987 1986 1985 1984 1983 1982

Other Vehicles That Use H4656 Bulbs

1992 Chevrolet Camaro 1992 Chrysler New Yorker 1991 Chevrolet G10 1991 Chevrolet Van 1991 Chrysler LeBaron 1991 Ford Country Squire