Volkswagen Cabrio Dome Light Bulb Size

The Volkswagen Cabrio dome light utilizes 6411 and DE3423 bulb sizes for the interior illumination components. Data for the specific lighting requirements covers the period from 1995 through 2002.

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
2000-2002	6411
1997-1999	DE3423
1995-1996	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

Additional Notes

The Volkswagen Cabrio dome light uses two festoon bulb types across its model years: the 6411 and the DE3423. Festoon bulbs are cylindrical lamps that mount horizontally between two spring-loaded contacts or end caps within a housing.
The 6411 bulb is specified for the 1995-1996 and 2000-2002 Cabrio. It is 36mm in length and uses an SV8.5 base, which is a single-contact bayonet-style end fitting common in festoon applications.
The DE3423 bulb is specified for the 1997-1999 Cabrio. It is 41mm in length and uses end-cap contacts, meaning the electrical connection is made through metal caps at each end of the bulb rather than through a central base pin.
The 6411 and DE3423 are not directly interchangeable. The 6411 measures 36mm while the DE3423 measures 41mm, and their contact types differ. Installing the wrong size risks a poor fit or no electrical contact within the dome light housing.
Both bulb types are ANSI-standard parts rated for use in the United States and Canada, operating on a 12-volt automotive electrical system.
The 6411 carries a rated wattage of 5W. The DE3423 specification does not include a wattage value, though both operate at 12V.