The 2005 Scion xB is available as a 4-door, 5-seat sedan. Starting at $13,730, the 2005 Scion xB (M5) is powered by a 1.5L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 31-mpg in the city and 34-mpg on the highway. The top of the line 2005ScionxB(A4) , priced at $ 14,530 , is powered by a 1.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 31-mpg in the city and 35-mpg on the highway.