The manifold looks to be a 1996 or later 16v. (It looks like the external EGR pipe at the bottom of the picture. As this is a 1995, could the engine have been replaced at some time?
But 1995 or 1996, I do not see any sensors at that location. The sensor in question LOOKS a lot like an oil pressure switch from this angle. Is it connected to anything? Could it have been just stuck in to plug something?
Did you notice the miss positioned clamp for the brake vacuum hose?