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Toyota Sienna Future Models
larger van (present sienna is just a bit smaller)
Split (60/40) flip down 3rd seat ( very good solution)
Increase in engine Hp & torque (dont know by how many)
Slider hidden in window appearance wise looks good
Side air bags
windows that go down (if they can make it sleek and flowing with the exterior)
DVD entertainment system
Things that might be interesting is if they have a
slide by side 2nd row seat.
Full size spare
Rear heating ducts
a 5 speed tranny to improve gas mileage