Consumer Reports has been road testing the run-flat tires on the 2007 Toyota Sienna XLE AWD. Their verdict? So far so good.
The run-flat tires on this model of the Sienna were the subject of several class action lawsuits filed in September 2005 in California and New York alleging that the tires wore prematurely or unevenly. In October 2005, the National Highway Traffic Safety Administration announced that it was looking into the complaints, and the NHTSA began a preliminary investigation in February 2006. In August 2006, Toyota Motor Sales resolved the class action suits by offering to extend the warranty on the tires or to reimburse consumers who had paid to replace the tires. The deal covered Dunlop SP Sport 4000T and Bridgestone B380RFT tires equipped as original equipment on the vehicle. The NHTSA investigation was closed in August 2006.
Comprehensive information on the class actions suits and the settlement can be found here.