Where is the oil pressure switch on a vw beetle 1600 air colled engine?

The oil pressure switch on a VW Beetle 1600 air-cooled engine is located on the front-left side of the engine block. It is a small, cylindrical-shaped switch with a single wire connector. The switch is screwed into the engine block and has a sensor inside that measures the oil pressure. When the oil pressure drops below a certain level, the switch will open and the oil pressure warning light on the dashboard will come on.