The 2021 FIAT 500X is available as a 4-door, 5-seat sport utility. Starting at $26,275, the 2021 FIAT 500X Pop is powered by a 1.3LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 30-mpg on the highway. The top of the line 2021FIAT500XTrekking Plus , priced at $ 31,455 , is powered by a 1.3LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 30-mpg on the highway.