Not a problem, but I have a question about what this could be. I was at a car event and a guy got in my car who says he tests turbines for a living. Putting his hand on the turbine is one way he can tell if there are issues. Even before he sat down, he put his hand on the open passenger side door and asked what the vibration he was feeling was. I said it was probably just the fans from the AC, but I turned them off, and the vibration persisted. I shut the driver's side door, and it immediate stopped. If I opened the driver's side door, the vibration in the passenger side door started again. Ideas? I assume it has to be the passenger side door actuator but what is it doing when the passenger side door is open and the driver's side door is closed? This isn't a noise you can hear, but you can feel it if you put your hand on the top of the door (the window was down). Does anyone else's car do this? Theories?