Many repo window regulators are crap and fail within months. Get a quality one. About $140ea and some swearing to fit. Some listed are genuine vw ( brazilian) . In this case I GUESS they are ok.? Hopefuly others can confirm. Sometimes its a cinch to fit. Bus stop claims to have good ones with price to match. Buying bus.? Assume you need new ones. Add labour. The other point from buyers perspective....how much other mechanical maintenance has also been minimal. ?? To check what the actual problem is. Is the winder handle attached on spline firmly but regulator ' slipping'? If so then likely the winding gear is worn and you need a full replacement. But its worth folding straight the lug at bottom of outer cable and winding/ pulling inner to check for wear on inner. You may get some service by just changing the inner. Feed it in as a reversal of removal. Same goes if its just a broken tag on inner that connects to the glass holder. Common for window lift chanel tab to break. check. Replace.