The 2021 FIAT 500X is available as a 4-door, 5-seat sport utility. Starting at $25,490, the 2021 FIAT 500X Pop is powered by a 1.3L, 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 2021 FIAT 500X Trekking Plus, priced at $30,860, is powered by a 1.3L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 30-mpg on the highway.