Volvo V50 Map Light Bulb Size

The Volvo V50 map light utilizes bulb sizes DE3423 and 6411 for the interior lighting system. Data for the specified components covers the range from 2005 through 2011.

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
2010-2011	DE3423
2005-2009	6411

Bulb Specifications

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

Other Locations

Additional Notes

The Volvo V50 map light uses two distinct festoon bulb sizes across its model years, with the 6411 fitted to 2005-2008 models and the DE3423 fitted to 2010-2011 models.
Both the DE3423 and 6411 are festoon-type bulbs, meaning they are cylindrical lamps that make electrical contact at each end rather than through a screw or bayonet base.
The DE3423 is 41mm in length and operates on 12 volts, with end-cap contacts serving as its terminal points.
The 6411 is 36mm in length and carries an SV8.5 base designation, operating at 12 volts with a rated output of 5 watts.
The 5mm difference in length between the DE3423 and the 6411 means the two bulbs are not interchangeable, as festoon holders are sized to grip the bulb at a fixed span.
The SV8.5 base notation on the 6411 refers to a festoon base with an 8.5mm cap width, a detail that further distinguishes it from the DE3423 in terms of physical fitment.
Both bulb sizes conform to ANSI standards applicable in the United States and Canada, indicating they meet a defined set of dimensional and electrical tolerances for those markets.
The 2009 model year of the Volvo V50 retains the 6411 specification, placing it within the same fitment group as the 2005-2008 production years rather than the later DE3423 group.