The Jaguar XFR side marker utilizes a 12961 bulb size for illumination purposes within the exterior lighting assembly. Available information covers the specific time period from 2010 through 2015 for the specified vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jaguar XFR uses the 12961 bulb for the front side marker position across the 2010-2015 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to a tubular bulb with a nominal width of 10/8 of an inch, commonly used in low-intensity automotive lighting positions such as side markers and parking lights.
The 12961 bulb uses a W2.1x9.5d base, which is the standard wedge-type base where the bulb's glass envelope itself acts as the retention mechanism rather than a separate metal cap.
The W2.1x9.5d designation specifies a wedge base 2.1mm wide at the contact point and 9.5mm in overall base length, defining the physical fitment envelope.
The bulb operates at 12 volts and 5 watts, consistent with a low-draw marker light application on a standard automotive electrical system.
The 12961 designation is specific to Philips and may correspond to equivalent bulbs sold under different part numbers by other manufacturers, provided the T10 form factor and W2.1x9.5d base are matched.
The single bulb size applying uniformly to all listed model years of the Jaguar XFR indicates no mid-cycle revision to the front side marker housing or its electrical specification during the 2010-2015 production span.