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Most probably the motor's gear teeth has worn. Its slipping on the regulator's teeth. Or BOTH has worn. Open the door card and manually push up the window while pressing the UP button on the window's switch.
I've replaced driver side window regulator before. The rivets you see is factory's original installation. Drill these out and replace with 8mm bolts/nuts leftover bits from waterpump replacement set. Install a used regulator set from eBay.
No worries there. Its either worn gear teeth OR tired window motor.
Amarin.
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