2005 TOYOTA SIENNA WAS REAR-ENDED ON 6/10/10. PASSENGER SEAT BELT DID NOT RESTRAIN THE PASSENGER. PASSENGER'S BODY WAS THROWN VERY NEAR THE DASH. RESULTED IN DAMAGE TO STERNUM AND NECK. WE ARE REQUESTING TOYOTA REPLACE THE PASSENGER BELT. WE ARE ENCOUNTERING RESISTANCE FROM TOYOTA TO REPAIR THIS SAFETY DEFECT. DRIVER'S SEAT BELT DID RESTRAIN DRIVER. *TR