I have a crank sensor from a Cinquecento / Punto 1.2 if it's compatible, happy to donate to the cause if you want to try it.
Thanks. I think that sensor will be compatible with the engine in the Y10 but it is the one for the Barchetta that isn't working which is shared with other 1.8 Fiat and Alfa engines.
The garage has installed a new one in the Barchetta that is the same length as one that came out but still nothing.