The 2003 Nissan Sentra is available as a 4-door, 5-seat sedan. Starting at $12,099, the 2003 Nissan Sentra XE (50 State) ULEV (M5) is powered by a 1.8L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 28-mpg in the city and 36-mpg on the highway. The top of the line 2003NissanSentraSE-R ULEV (A4) , priced at $ 16,999 , is powered by a 2.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 28-mpg on the highway.