Rear window lowering by itself

[daveg2566]

Hi guys
I’ve got a 2014 A7 and on a couple of occasions lately the drivers side rear window has lowered by itself , done it a few times, usually only about 2 inches but then when I put it back up it’ll come down again either same or has gone to halfway, it’ll seem to do it a couple of times then stay up but doesn’t do it every time I use the car, anybody got any ideas? Checked to make sure nothing is stuck to the door seal and can’t see anything out of place

[GwynThomas]

My 2009 A6 rear drivers side window used to get stuck occasionally when I was closing it which would cause it to think there was something trapped in the window and re-open a couple of inches.

It never opened spontaneously though, it only happened when I had opened it and was then trying to close it again.

[Flip272]

I had this on a Z4 coupe, turned out to be the window lift sensor, acting like something was blocking the window from closing then dropping the window a couple of inches, £50 sensor later and no more problems

[VAG-Abound]

Does it sound a bit strained when lifting? One of ours had a damaged / frayed wire cable which I think the sensors interpreted as a blockage on the actual window, so it misbehaved. As I went onto the M3 one day and closed windows for higher speed driving there was a big "crack" sound as part of the overloaded mechanism finally failed and the window promptly fell into the door. Bit breezy for 20 miles, but a window lifter repair kit sorted it out.