Jaguar XKR License Plate Bulb Size

The Jaguar XKR license plate light requires a bulb size of 12961 for the exterior lighting system on the rear of the vehicle. Available data covers the range of 2000 to 2015 for the specified 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
2000-2015	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 XKR uses the 12961 bulb for the license plate position across the 2000-2015 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
The 12961 operates at 12 volts and 5 watts, which is standard for low-current auxiliary lighting positions such as license plate illumination.
The base type is W2.1x9.5d, a wedge-style base that relies on tension from the socket rather than a bayonet or screw mechanism for retention.
The W2.1x9.5d base designation is specific enough that substituting a bulb with a different base type would result in an incompatible fit, even if the voltage and wattage ratings matched.
The T10 form factor is widely used across the automotive industry, meaning the 12961 is not exclusive to the Jaguar XKR and is available from multiple manufacturers under equivalent part numbers.
When sourcing a replacement, cross-referencing the W2.1x9.5d base type alongside the 12V/5W rating is necessary to confirm interchangeability with non-Philips alternatives.