3rd row power seats are malfunctioning and are operating while vehicle is in motion. multiple times, and on different days, the power seats have started to close while passenger is seated and buckled in the seat. occurred today while on the highway, at highway speed while my wife was seated in the drivers side 2 seat split. the seat started to close on its own - no one touched any button and we had been driving for over an hour. the seat put pressure on her until it stopped in a partially closed position. the seat buttons then did not work to reopen the seat back for several minutes. this would be extremely dangerous for a small child. this has happened in a similar scenario on multiple occasions and we are certain that the power seats are malfunctioning.
I have a question regarding vehicle seat movement. i have been told by two dealerships that the seats in the third row of the toyota sienna are meant to have some play to them. my main concern is that with a couple of car seats in the third row, or a couple of passengers, the movement of the seats may be an issue. all four seat latches rotate when lifting on the seat by hand, allowing the seat to twist, move to the rear of the vehicle and move laterally. this would be less of a concern if the seats themselves were not the mount for the latch system and seat belts. my question is, what movement is allowed of these seats? in an accident, a huge amount of force can be exerted on these latches, and if they allow play, that force can be multiplied by that movement. the increase in force could potentially cause the latches to fail. currently there is no safety test for third row occupants or rear end collisions, from what i have researched. the attached files show the accessible latches, and their movement ...