Forum for competition engine enthusiasts. RIP Guy Croft 09/11/2020 - This forum will continue both as a source of information and as a memorial to Guy.
Such sensors can be bought easily for Fiat Cinquecento 700 for only about 10 pounds instead paying about 40-50 pounds for the same sensor for example for Intergrale. For Cinquecento it has only 2 wires but i never had any problems with it. The other difference may be the length of the cable(easy to fix).
The manufacturer is of course Magneti Marelli.