Driving alone I swore I heard a rattle coming from the passenger door. Had someone else drive and rode in passenger seat, couldn't hear a thing.
Sometimes it wouldn't make a noise, other times every bump sounded to me like the door frame was going to fall off. Usually change would occur after I had a passenger or a big change in weather temperature. Dealer checked it once, tightened up the door and it was gone for a few days, then it was back again. Went back to the dealer today, service tech drove it and confirmed there was a rattle, BUT it was the passenger seat - hence when someone is in it you didn't hear a thing.
The fix was to put leather conditioner between the crack of the seat back and seat, worked like a charm. The sound didn't seem like rubbing leather, but the problem is fixed 100% and the tech said this has been an issue on other Lexus cars with the leather seats.
Wonder if other reported door rattles might be the same thing?

 

weird stuff going on inside your car.... u sure its not a poltergiest?

 

I went through something similar - and ever time the service manager rode with me .... no rattle. Sometimes just touching seat stoped it (I will try another round of conditioning too).

I also had different rattles when the top was up or down. Lots of combinations to try out. I may have to spend all summer in the car!