I can hear something rattling inside the front passenger's side door when I am driving or it is being closed.
Hello. The rattling noise you are hearing in the door is probably due to a nut or bolt that has come loose and has fallen to the bottom of the door. With a power window regulator, the window glass and door should be looked at to avoid failure which may cause further damage. You may need the aid of mechanic to remove the door panel and diagnose the noise to see what repair will be needed.
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