Hi!

i own a 2009 BMW E81. Two weeks ago my window regulator on the drivers side broke down. A week later I discovered that the passengers window only moves up and down in small increments. I get a warning on my dash that there is something wrong with the window.
Is this unlucky coincidence or could there be a connection between the repair of the left window and the break down of the right window?
Before I open up the right passenger door and replace the motor and all I want to make sure that it has nothing do to with broken wires or something in the drivers side door