I parked my 2015 Tesla Model S and found the rear door on the passenger side would not open from the outside even though the door handle was extended. This is a safety concern as we could not open the door to remove our pet dog from the car. It would also not be possible to open the door from the outside to remove a child in a car seat next to the door or an elderly or disabled person sitting next to the door who is unable to open the door from the inside. This could be life threatening in the case of a car crash. It is a major safety defect that should be repaired at no cost by Tesla for the entire lifespan of the car. The problem persists and is reproducible.