Jaguar S-Type License Plate Bulb Size

The Jaguar S-Type license plate light requires a 12961 bulb size for proper installation and function within the rear housing assembly. Available data covers the production span from 2000 through 2008 for the specified vehicle lighting component.

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 Type	Shop
2000-2008	12961	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price

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Additional Notes

The Jaguar S-Type uses the 12961 bulb across all documented model years from 2000-2008, making it the sole license plate bulb type specified for this vehicle throughout its entire production run in these records.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which is one of the most widely used bulb types in automotive license plate and interior lighting applications.
The T10 designation refers to the bulb's tubular shape, with the number indicating its width in tenths of an inch, placing it in the small-format category commonly found in low-intensity vehicle lighting positions.
The 12961 operates at 12 volts and 5 watts, which are standard electrical values for low-draw auxiliary lighting circuits in passenger vehicles.
The base type for this bulb is W2.1x9.5d, a wedge-style base that relies on tension fit rather than a bayonet or screw mechanism, meaning the bulb is held in place by the socket walls alone.
The W2.1x9.5d base specification is a precise fitment standard, and substituting a bulb with a physically similar but differently coded base risks an improper fit or electrical incompatibility within the Jaguar S-Type license plate housing.
While the T10 form factor is shared by many bulbs across different manufacturers and applications, the 12961 specifically reflects Philips' product line, and equivalent bulbs from other manufacturers must match the 12V, 5W rating and W2.1x9.5d base to be considered interchangeable.