The Jaguar XKR side marker utilizes a 12961 bulb size for illumination purposes within the exterior lighting assembly. Data for the specified component covers the period from 2000 through 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jaguar XKR uses the 12961 bulb across all listed model years for both front and rear side marker positions, making it the sole bulb type present in these specifications.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base, rated at 12 volts and 5 watts.
The T10 designation refers to a tubular bulb approximately 10mm wide, and the W2.1x9.5d base is a wedge-type base where the glass envelope itself acts as the retaining element rather than a metal shell or pins.
At 5 watts on a 12-volt circuit, the 12961 draws approximately 0.42 amps, which is consistent with low-current marker light applications.
The front side marker position on the Jaguar XKR uses the 12961 bulb across model years 2000-2006 and 2010-2015.
The rear side marker position uses the 12961 bulb across model years 2000-2009.
The W2.1x9.5d wedge base is a standardized IEC base type, meaning the 12961 is interchangeable with other T10 wedge bulbs sharing that base designation, provided voltage and wattage ratings are also compatible with the socket circuit.
Because the 12961 is a Philips-branded part number rather than a universal industry code, equivalent bulbs from other manufacturers are typically cross-referenced under the common T10 or W5W designation, where W5W denotes a wedge bulb at 5 watts.