Warranty work is not popular with dealers because the rate Fiat pay is lower than they charge retail customers, and they have the bother and risk of getting it from Fiat.
So heaven help you if you break down a long way away from the dealer who sold it.
When I had a faulty soot sensor the only one who would take it was the supplying dealer. Even then they tried to fob me off - asked if there wasn't a dealer nearer to me. I replied they never asked that when I wanted to buy a new van! Then they said there is no service record. I replied I serviced it myself and, in any case, the soot sensor is not a service item. So it makes no difference whether it has been serviced or not. Which they accepted, and replaced it under warranty (after a 2 week wait for an appointment for a one hour job)