The 2006 Scion xB is available as a 4-door, 5-seat wagon. Starting at $14,030, the 2006 Scion xB (M5) is powered by a 1.5L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 30-mpg in the city and 33-mpg on the highway. The top of the line 2006 Scion xB (A4), priced at $14,830, is powered by a 1.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 30-mpg in the city and 34-mpg on the highway.