Window regulators on 2003 Ford Focus

Howdy: My friends daughter has a 2003 Ford Focus and she has had the car into the shop twice before (under warranty) to fix the window
regulator on the two back windows. Now she is experiencing the same problem on the drivers side window, but unfortunately the car is now out of warranty.
It just seems weird that three of these windows have had problems with the window regulator. Is there a service bulletin or something about this?? Is this a common occurance with these Fords?? Any suggestions?
The Seabat

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