Oil Pressure Sensor

[evomind]

I believe my oil pressure sensor is leaking. Couldn't see it well from underneath, and not sure if I can get to from up top...
How tough is this to replace and from where would you get at it?
Thanks

I also have a slight leak, I think its coolant from the front passenger corner. Looks like its from the radiator but I cant see from where because of the shielding. It drips from above the shielding and then drips down the shielding.
Any opinions?
I know it could be a simple break in the hose, a bad connection, the obvious etc, but any other things known to go wrong up there?
Again thanks