Audi S6 License Plate Bulb Size

The Audi S6 license plate illumination requires bulb size DE3423 or 3893 depending on the specific version. Data for the listed components covers the range from 1995 to 2014.

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 Type	Shop
2013-2014	DE3423	Check Price
2007-2011	DE3423	Check Price
1995	3893	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, specialty application. 12V.	3893	Check Price

Other Locations

Additional Notes

The DE3423 is the license plate bulb type used across the Audi S6 for model years 2007-2011 and 2013-2014.
The DE3423 is a festoon-style bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The DE3423 has a 41mm length and operates at 12 volts, conforming to the ANSI standard recognized in both the United States and Canada.
The 1995 Audi S6 uses the 3893 bulb for the license plate position, which differs entirely in construction from the DE3423 used in later model years.
The 3893 is a dual-filament bulb with a BAY15d bayonet base, a base type that locks into its socket with a twist and features two offset pins to prevent incorrect installation.
The BAY15d base on the 3893 is classified as a specialty application fitment, indicating it is not interchangeable with the festoon-style DE3423 used in other S6 model years.
Both the DE3423 and the 3893 operate at 12 volts and meet ANSI standards for the US and Canadian markets, though their physical construction and socket types are incompatible with one another.