As rival minivans continue to encroach on the Daimler Chrysler strangle hold in the market, the Toyota Sienna proves itself capable of holding the top spot. The Toyota real player in the minivan race started as a 1998 model. In 2004, the Sienna got a whole new look and a whole slew of electronic gadgetry to keep up with other minivan entries. In 2004, the Sienna helped change the image of the minivan. When the second generation was released, it had an unconventional design that started a trend away from the boxy, straight-edged minivans. The Toyota Sienna comes with a five-year/60,000-mile powertrain warranty and gets an estimated 21-23 mpg on the highway.