Peter,
It is a heater , not a sensor. You would need to order an "oil vapour heater fot Fiat 2.0jtd".
If you feel the need to buy a replacement, Coastal Motorhomes is frequntly recommended for spares. I have used them myself for other items.
However please see earlier post on other thread that you have posted on. It confirms what I suggested.
Please note it is not good forum etiquette to post about the same item on multiple threads. It wastes time and causes confusion for future readers.