23/08/2008 09:20. DEATH VALLEY, California — Toyota engineers were caught testing a 2010 Sienna prototype in the hot desert this week, and judging from the rough rear sections of the minivan mule, the future Sienna is likely to undergo a full redesign.

The current-generation Sienna has been on the market since 2004, receiving just a minor refresh in 2006. With a 119.3-inch wheelbase, the 2009 Sienna provides a class-leading 149 cubic feet of cargo capacity, and it's unlikely Toyota will want to move away from that... // Edmunds.com/Inside Line