Need to know what engine you have.
spark plug location in a jaguar
Coil 4
The Spark plug location on the 2001 2.5 liter dohc is under the valve cover.
under the ignition coils, there are one coil for each spark plug.
The spark plug locations are all on the same side of the engine. They are in the side of the head, where the plug wires are connected.
SPARK PLUG (DR8ES) (NGK) SPARK PLUG (X24ESR-U) (DENSO)
Holy crap! Do you see 4 wires on each side of the engine that seem to just go right into the engine? Those are spark plug wires, and the spark plugs are at the end of them bolted into the manifold. If you have a diesel engine, you don't have spark plugs.
The best way is to use the spark plug socket out of the factory tool kit. If you do not have that use a normal 5/8" socket to loosen the spark plug. Use the spark plug wire to snap back on after the plug is loose and pull it out. The spark plug is at the very top of the engine, the spark plug wire is a real good indicator of its location.
There is not spark plugs in a diesel engine.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front ( there is a coil above each spark plug )
firewall 3 - 6 2 - 5 1 - 4 front ( The spark plug location numbers in the engine cylinder heads )
Do you have C.O.P. ( coil on plug ) If so, under the coil.