TL* THE CONTACT OWNS A 2011 TOYOTA SIENNA. WHILE EXITING THE VEHICLE, THE DRIVER SIDE SLIDING DOOR MADE CONTACT WITH THE PASSENGER AND FAILED TO RETRACT. THE PASSENGER SUSTAINED AN INJURED BACK, WHICH REQUIRED MEDICAL ATTENTION. THE CONTACT INDICATED THAT THE SAFETY FEATURE, WHICH ALLOWED THE SLIDING DOORS TO RETRACT WHEN MAKING CONTACT WITH SOMETHING, HAD FAILED ON SEVERAL OCCASIONS. THE CONTACT STATED THAT THE FAILURE WAS INTERMITTENT AND DID NOT BEGIN UNTIL AFTER THE VEHICLE WAS SERVICED PER NHTSA CAMPAIGN NUMBER: 16V858800 (STRUCTURE). THE VEHICLE WAS TAKEN TO THE DEALER (FRONTIER TOYOTA IN VALENCIA, CA), BUT THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 51,950. *LN CONSUMER STATED SLIDING DOOR - DRIVERS SIDE MALFUNCTIONED UPDATED 7/19/18*JB ... *TR