Audi V8 Quattro License Plate Bulb Size

The Audi V8 Quattro license plate light requires a 3893 bulb size for proper installation and function within the rear exterior housing. Data for the specific lighting component covers the range from 1990 through 1994.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1990-1994	3893

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, specialty application. 12V.	3893

Other Locations

Additional Notes

The Audi V8 Quattro uses the 3893 bulb for the license plate position across all available model years, spanning 1990-1994.
The 3893 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard shared across the United States and Canada.
This bulb operates on a 12-volt electrical system, which is consistent with standard automotive low-voltage architecture.
The 3893 features a dual-filament design, meaning it contains two separate filaments within a single bulb envelope, each serving a distinct function.
It uses a BAY15d bayonet base, a mount type that requires a push-and-twist motion to seat the bulb, with two offset pins that prevent incorrect orientation during installation.
The BAY15d base is offset-pin, meaning the two pins are positioned at different heights along the base, which physically prevents a single-filament bulb with a BAY15s base from being substituted, as the pin geometry differs.
The 3893 is classified as a specialty application bulb, indicating it is not among the most broadly distributed automotive bulb types and may have a narrower range of direct substitutes.