Saab 9-3 Trunk Bulb Size

The Saab 9-3 trunk utilizes DE3423 and 6411 bulb sizes for the internal lighting components located within the rear cargo area. Available data covers the specific range from 1999 through 2011 for the listed vehicle specifications.

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
2004-2011	DE3423
1999-2002	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 Saab 9-3 trunk uses two festoon bulb types across its model years: the DE3423 for 2004-2011 and the 6411 for 1999-2002.
A festoon bulb is a cylindrical lamp that mounts horizontally between two spring-clip contacts at each end of a housing, which is a common configuration for enclosed interior spaces such as trunks.
The DE3423 is an ANSI-standard festoon bulb rated at 12V with a 41mm length and end-cap contacts.
The 6411 is an ANSI-standard festoon bulb rated at 12V and 5W with a 36mm length and an SV8.5 base.
The SV8.5 base designation on the 6411 refers to a festoon base with a nominal 8.5mm width, which determines socket compatibility independently of the bulb's length.
The DE3423 and 6411 differ in length by 5mm, and this physical difference means the two types are not interchangeable despite both being 12V festoon bulbs.
Both bulb types carry ANSI standardization applicable to the US and Canadian markets, meaning equivalent bulbs from different manufacturers sharing the same designation conform to the same physical and electrical specifications.