Audi 80 Dome Light Bulb Size

The Audi 80 dome light requires a 6411 bulb size for proper installation within the interior lighting housing. Available data for the specified component covers the range from 1988 to 1992.

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
1988-1992	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The Audi 80 uses the 6411 bulb for its dome light across the 1988-1992 model years.
The 6411 is a festoon-type bulb, meaning it is cylindrical in shape and makes contact at both ends rather than through a screw or pin base.
The 6411 bulb follows the ANSI standard, indicating it meets the specifications recognized in the United States and Canada.
The bulb has a 36mm length, which is a critical fitment factor, as festoon bulbs must match the span of the socket clips to seat correctly.
The SV8.5 base designation refers to the contact cap size at each end of the festoon bulb, and substitutes must share this base type to fit the Audi 80 dome light socket.
The 6411 operates at 12 volts, consistent with the standard electrical system voltage of passenger vehicles in this era.
At 5 watts, the 6411 draws relatively low power, which is typical for interior courtesy lighting applications.
Because festoon bulbs are sized by length, any replacement for the Audi 80 dome light must be confirmed at 36mm; a bulb of a different length will not make proper contact with the socket terminals.