OE oil pressure sender to fit all TVR Speed 6 models. 0-120 psi oil pressure sender unit to fit all TVR Speed 6 engines both 3.6 and 4.0 litre versions. Generally reasonably reliable but can suffer from oil leaks as they get older. Special offer price on original equipment oil pressure sender whilst stocks last!!Original sender only had one wire. The other connection goes to ground and there may well be a ground wire taped to the wiring loom on the car.