Bonnet up to change the oil and filters today, saw this. No idea what it is, or how it should fixed. pushed it back in and it seemed to stay put. Its at the back of the engine (2004 TD5) on the heater box side.
Looks like the oil pressure/temperature sensor. Make sure your oil light comes on with ignition and goes out when engine started. You do not want to run an engine without a working oil pressure light.
