AutoBuyGuide.com gives you all the details of each 2008 Toyota Sienna incentive program from the manufacturer and dealers. You may be throwing away thousands of dollars if you're not taking advantage of current incentive offerings! Popular 2008 Toyota Sienna incentives used to entice new car buyers are interest-free auto loans. Toyota and its car dealers will utilize these cash, lease, and finance 2008 Toyota Sienna incentives to lure consumers to buy specific vehicles that they may have overstocked or to help clear out last year’s models. Occasionally, they will run factory-to-dealer Toyota Sienna cash incentives to encourage car sales.