Jaguar C2P2137. Check engine, vehicle variant and VIN limits before ordering. The following fitment information comes from the Jaguar catalogue for this exact part number.
XK (X150) 2006–2014
Radiator Header Tank-Naturally Aspirated (3.5 Litre,4.2 Litre naturally aspirated,5.0L OHC SGDI NA V8 Petrol - AJ133)