BMW 760Li Dome Light Bulb Size

The BMW 760Li dome light requires bulb size 12961 or DE3423 depending on the specific application. Data for the components spans the range from 2003 to 2015.

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
2010-2015	12961
2004-2008	12961
2003	DE3423

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

Additional Notes

The BMW 760Li uses the 12961 bulb for its dome light across the 2004-2015 model years, with the sole exception of the 2003 model year, which uses the DE3423 instead.
The 12961 is a Philips part number designating a T10 miniature wedge bulb rated at 12 volts and 5 watts, fitted with a W2.1x9.5d base.
The W2.1x9.5d base is a wedge-type connector in which the glass envelope itself acts as the retention mechanism, with no separate metal base pins.
The 2003 BMW 760Li dome light takes the DE3423, an ANSI-standard festoon bulb rated at 12 volts with a 41mm length and end-cap contacts.
Festoon bulbs make electrical contact through metal caps at each end of the tube, a design that is physically incompatible with the wedge socket used by the 12961.
Because the 12961 and DE3423 use fundamentally different base types, the two bulbs are not interchangeable despite sharing the same 12-volt operating voltage.
The 12961 designation is manufacturer-specific to Philips, meaning cross-referencing to an equivalent T10 W5W part may be necessary when sourcing from other suppliers.
The DE3423 follows ANSI standardization, which is recognized across the United States and Canada, making equivalent replacements broadly available under that designation.