My back windows roll down fine but when I try to roll them back up they go very slow or hardly at all. I took it to the dealership and they said that it was road dirt inside the window track. The mechanic cleaned out just the track where he could get to. I wasn't buying it!! Because of the timing that I came in and the shop was closing I will be going back because the Mechanic said he would like to clean the rest of the track inside the door. Still not buying it and I told them that. I think it has something to do with the alternator or electrical not giving enough juice to roll up the window. Get this it rolls up faster if I'm moving in the car like it's giving it juice then if I just sit in park. I will respond more next week when I go in to have it fixed.