Volvo 740 Dome Light Bulb Size

The Volvo 740 dome light requires a 6411 bulb size for proper installation and function within the interior lighting housing. Available data covers the production range from 1985 through 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
1985-1992	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 6411 is the sole dome light bulb size listed for the Volvo 740 across all model years covered by these specifications, spanning 1985-1992.
The 6411 bulb follows the ANSI standard, meaning it conforms to a standardized designation recognized across the United States and Canada.
The 6411 is a festoon-type bulb, a form factor characterized by a cylindrical tube with metal end caps that make contact with spring-loaded holders rather than a screw or bayonet base.
The bulb has a 36mm length, which is the contact-to-contact span of the festoon body and is the critical fitment figure for this bulb type.
The 6411 uses an SV8.5 base, a designation that refers to the 8.5mm width of the end caps on the festoon body.
The electrical rating of the 6411 is 12 volts and 5 watts, consistent with standard low-current interior lighting in 12-volt automotive electrical systems.
Because festoon bulbs are sized by both length and cap width, substituting a festoon bulb of a different length or a different base designation risks an improper fit in the Volvo 740 dome light socket.