To be absolutely certain, you should:
* Consult your vehicle's repair manual: This is the most reliable source for the precise location.
* Look at a diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) allow you to search by year, make, and model to find diagrams showing the location of the oil pressure sending unit.
By visually inspecting the engine block in the area described above, referring to a diagram, and/or using your repair manual, you should be able to locate it easily.