Question: I've had the driver's side door panel taken off a few times to address rattles in the door. Didn't help. Most recently it was taken off because the control unit for the power windows and locks went bad. I'm left with a door that sounds noticeably cheap in comparison to the other side when I close it. It sounds hollow like my old Civic when the windows were rolled down. There used to be a tight "thug" when you closed it. That's lost. Any idea as to why this happened ?

 

I have the same issue here, after they tried to fix the rattles... I'm just going to dynamat the doors when the weather gets warm here and not have to worry about it coming back whenever you bring the car in for service...

 

They probably did not replace the inner plastic lining. I too have dynamated all four doors and the closing sound is so much more luxurious - no tinny sound.