The car is a Fiat 500, the latest shape one. I don't know if all of them use that plug.
It wouldn't surprise me at all if the same connector was on cars built 15 years ago. However, I would have no idea what car, if any, would have the right plug rather than a combined accelerator sensor and plug. I could spend days driving round scrap yards to find out.
It certainly cost me far less to buy a couple of new plugs and sockets, and the right crimps and seals, than a second-hand accelerator assembly.