Fiat may have fixed it’s problems in the 1990’s...but for the US market it was too late. It’s reputation was cemented, and continues today. They may every well be fine cars at the lower end of the price scale, but buyers are brand loyal and you won’t see Fiat or Renault do well in the US markets
For all of their advertizing push I see damned few Fiat branded cars on the road.
The Fiat was only imported to help Chrysler meet CAFE standards, The CEO is on the record stating he doesn’t want to sell one more FIAT than he is required to by law... he never wanted to import them in the first place.