The 2004 Toyota Sienna is available as a 4-door, 7-seat passenger van. Starting at $22,955, the 2004 Toyota Sienna CE FWD is powered by a 3.3L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway. The top of the line 2004ToyotaSiennaXLE Limited AWD , priced at $ 37,150 , is powered by a 3.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway.