Sienna parked inside garage. Garage door was open. I slammed the trunk door to close it. My 10 year old son complained why I slammed door; I could have closed it gently. I told him because sometimes the trunk door does not close although it appears to have closed. We got in the Sienna. I started engine. Garage door still open. I reversed the car. Then heard small noise from the back. Then I saw the trunk door was up and open in up position. I parked the car, went back. The Sienna tag plate was broken half in the middle, apparently hitting the garage door. I closed the door down. Slowly backed the car out of the garage. Then my wife and I had to force the garage to close because the car's backdoor knocked one of its gliding wheels off track. We had to force it back in. The door opener was off the track as well. One day later after trying several times, the door was back working again. We are testing the door now. The car drives fine. ~10 days I dumped books off library and closed the trunk door. After going through a roundabout for 0.7 mile, the signal flashed indicating the trunk door was loose. I had to pull over to close it. My wife also said several times now she had the same problem: The door went loose and then signaled us it was loose minutes or miles after we started the engine and left the parking slot.

- Chestnut Hill, MA, USA