Volvo S60 Map Light Bulb Size

The Volvo S60 map light utilizes DE3423 and 6411 bulb sizes for the interior lighting components. Available information covers the period starting from 2001 through 2009.

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
2007-2009	DE3423
2001-2006	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 S60 map light uses two distinct bulb sizes across its model years, with the 6411 specified for 2001-2006 and the DE3423 specified for 2007-2009.
Both the DE3423 and 6411 are festoon-type bulbs, meaning they are cylindrical in shape and mount by pressing lengthwise between two spring-loaded contacts within the fixture.
The DE3423 is 41mm in length, while the 6411 measures 36mm. The 5mm difference makes these two bulbs physically non-interchangeable despite their shared festoon form factor.
Both bulbs conform to ANSI standards applicable in the United States and Canada, indicating they meet a defined set of performance and dimensional tolerances for those markets.
The 6411 operates at 12V with a rated output of 5W and uses an SV8.5 base, which refers to a smooth-ended festoon cap with an 8.5mm cap width.
The DE3423 also operates at 12V and uses end-cap contacts, though no wattage figure is listed in its specification.
The SV8.5 base of the 6411 is a specific contact style, and substituting a festoon bulb with a different base type, even at the correct length, would result in an improper fit within the socket.
The 2006 Volvo S60 uses the 6411, while the 2007 model uses the DE3423, indicating a specification change occurred between those two model years.