Porsche Cayenne License Plate Bulb Size

The Porsche Cayenne license plate light requires 12961 and DE3423 bulb sizes for proper illumination. Available data covers the specific range from 2003 through 2014 for the vehicle.

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
2011-2014	12961
2008-2010	DE3423
2003-2006	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 Porsche Cayenne uses two distinct bulb types across its license plate lighting specifications: the 12961 and the DE3423. These are not interchangeable, as they differ in base type, physical form, and contact design.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. The wedge base relies on the bulb's glass envelope being gripped directly by the socket, with no separate metal base or pins.
The DE3423 follows the ANSI standard used in the United States and Canada. It is a festoon-type bulb with a 41mm length and end-cap contacts, meaning electrical connection is made through metal caps at each end of the cylindrical glass tube.
The Porsche Cayenne (2011-2014) specifies the 12961 bulb for the license plate position. This T10 wedge format is among the most widely used bulb types in automotive interior and exterior lighting applications.
The DE3423 festoon bulb is specified for the Porsche Cayenne across the 2003-2010 model years, covering the first generation of the Cayenne's production run in this dataset.
Both bulb types operate on a 12V electrical system, which is standard for passenger vehicle lighting circuits. The 12961 carries an explicit 5W power rating, while the DE3423 specification does not include a wattage value in the provided data.
The T10 wedge base of the 12961 is a push-in fitment, while the DE3423 festoon installs by compression between two spring-loaded contacts within a rectangular or cylindrical housing. Substituting one type for the other is not physically possible without socket modification.
The 41mm length of the DE3423 is a critical fitment factor. Festoon bulbs are available in multiple lengths, and installing an incorrect length, such as a 36mm or 44mm variant, would result in poor contact or failure to seat properly in the housing.