[mikefocke]

is that they are so specific as to location (side of engine, front or back) and cause of fault (Short, incomplete circuit, just slow response).

But there are ones that are specific to the model year so if posting about them be sure you specify your model year and engine size.

Of course one sure way to tell what part you need is to take the old one out as the part number, both Bosch and Porsche, will be stenciled on the sensor itself.