I have this oil leak that is coming from a part that I have know Idea what it is. All i have to do is replace it to stop the leak (im assuming)

but I need to know what it is first.
heres a picture of it. Its the copper colored thing. Its right on top of the steering rack to the left of the oil filter on a 2001 pathfinder LE 3.5l.
Does anyone know what it is?