The 2018 Nissan Maxima is available as a 4-door, 5-seat sedan. Starting at $33,420, the 2018 Nissan Maxima S is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway. The top of the line 2018 Nissan Maxima Platinum, priced at $41,090, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway.