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|MPG||Number of Vehicles|
|18 miles per gallon||1 vehicles|
|19 miles per gallon||0 vehicles|
|20 miles per gallon||2 vehicles|
|21 miles per gallon||0 vehicles|
|22 miles per gallon||2 vehicles|
|23 miles per gallon||2 vehicles|
|2003||2003 4dr Minivan, ext. 266-hp 3.5L V6 6-sp shiftable automatic FWD||20.83||
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|With the 296-horsepower 3.5L V6 engine, 8-speed shiftable automatic transmission, and front-wheel drive, the 2003 Toyota Sienna has been averaging 20.83 MPG (miles per gallon).
The 2003 Toyota Siennas in this analysis were driven mostly on the highway at an average speed of 69 miles per hour (about 41.4 percent of the miles driven). The rest of the miles were in the city (23.6 percent), in heavy traffic (5.7 percent), and in the suburbs (0 percent).
In addition, the average 2003 Toyota Sienna in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.