Just bought an N13 as a little run around, the near side front window just drops about a quarter when driving. I've had it wedged up but it's a bit annoying.

I am assuming I need a new regulator, but the motor does whir when the button is pressed as if it is trying to move. Does this mean the motor is working fine but something is damaged on the pulley or the track? Strangely enough the rear one will go down under its own power but won't go back up. I'm just hoping for an easy fix I suppose..

Thank you for the help.