As loanrangie has said, I replaced mine when I had fuel related fault codes, you will need to takeoff the soft cover over the motor to get to the sensor which is screwed int the fuel rail at the front end of the motor.
I got a new OEM sensor from UK but it made no difference to my problem but was part of my journey to avoid a new HPFP, the end result was a new HPFP was the way to go.
Cheers
RichardK
				
			 
			
		 
			
				
			
			
				RichardK
Series IV Matrix Offroad Camper following our  Discovery 3 with E  Diff, BAS Remap, Mitch Hitch, Uniden UHF, Codan NGT HF, Masten TPMS,  Proquip Compressor Guard, ARB Winch Bar, Milemarker Hydraulic Winch, 4x4  Intelligence Rear Wheel Carrier, VMS GPS with Rear Camera,
			
			
		 
	
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