One problem related to door has been reported for the 2009 Lexus RX350. The most recently reported issues are listed below.
Lexus RX 350 back door does not remain up when there is snow on the roof or snow on the door. It goes up automatically via key or dashboard entry or use of rear door opener, but when it gets up and you are unpacking from the rear cargo area, it comes down without warning and twice hit my wife in the head.