Chevrolet Corsa Sedan. The right front alzacristal does not work, that is the engine if it works, then I opened the panel and in the linga there is a piece that revolves around the alzacristal, but after using them a few times, that piece is loosened, from what I saw It would have some broken rivet in the mechanism that goes inside the door, and that is why the piece that looks like a gear when it receives the force of the motor, leaves the alzacristal. I would like to know if something similar happened to someone, and how do I solve it? Thank you.