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1991 Audi Coupe Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.
Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

1991 Audi Coupe Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Turn Signal Front7528—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Low Beam9004HB1Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

Amazon
License Plate3893—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Brake Light7528—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Parking Light7528—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Tail Light7528—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
High Beam9004HB1Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

Amazon

1991 Audi Coupe Fitment Notes

Across the 1981-1991 production range, our database shows changes in the listed Low Beam, Brake Light, High Beam positions. Use the chart above for this 1991 model, then confirm the bulb number in your vehicle before buying.

Known fitment limitations

  • factory HID or LED packages may use different parts
  • fog lights may depend on equipment package
  • aftermarket headlight assemblies may use different bulbs
  • regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 1991 Audi Coupe's bulbs compare to other years?

The 1991 Audi Coupe uses the same bulbs as the 1990 model.

This bulb configuration covers the 1990–1991 model years. ← 1990

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Other Coupe Years

19901987198619851984198319821981

More from Audi

100100 Quattro100 Series200200 Quattro4000 Quattro50005000 Quattro

Other Vehicles That Use 9004 / HB1 Bulbs

2005 Chevrolet Venture2005 Pontiac Montana2004 Oldsmobile Silhouette2003 Dodge Ram Van2003 Dodge Wagon2003 Isuzu Rodeo Sport

Frequently Asked Questions

Our database lists 9004 for the 1991 Audi Coupe low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists 9004 for the 1991 Audi Coupe high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 1991 Audi Coupe can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed 9004 size against the bulb in the housing before choosing a replacement or upgrade.

The 1991 Audi Coupe does not have a fog light bulb listed in our current database. If your vehicle has fog lights, verify the bulb in the housing or owner's manual before buying.

The 1991 Audi Coupe uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many 9004 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as 9004 / HB1, and verify the factory housing before buying.

No — the 1991 Audi Coupe uses the same bulb sizes as the 1990 model. This configuration has been consistent across the 1990–1991 generation.

The 1991 Audi Coupe is the last year in the 1990–1991 generation to use the 9004 bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed 9004 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen 9004 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 1991 Audi Coupe.