Hi all, has anyone else had this? the passenger window has just started to make a very loud squealing noise when it goes up and down. Same happened to the drivers door but only once. I have cleaned the window both sides and gummied the rubber both sides, still does it. Thanks in advance, Mike.
Squealing window
- Thread starter MikeyH
- Start date
I had a similar issue with one of the rear windows on our X3 - turned out the 'squeal' was coming from the part of the guide channel that you can't see i.e. the part inside the door.
As the Z4 windows are frameless, if your windows are still making the sound with the door open, I'd suspect a similar issue with the lower guides
To avoid having to remove the door card & membrane, I cured it by the application of silicone grease into the upper guides (with the window down), then ran the window up/down a few times to carry the grease into the lower channel - repeated the process a couple of times and the squeal reduced and then disappeared. Then gave the glass a good clean to remove any grease that had spread from the guides onto the surface.
As the Z4 windows are frameless, if your windows are still making the sound with the door open, I'd suspect a similar issue with the lower guides
To avoid having to remove the door card & membrane, I cured it by the application of silicone grease into the upper guides (with the window down), then ran the window up/down a few times to carry the grease into the lower channel - repeated the process a couple of times and the squeal reduced and then disappeared. Then gave the glass a good clean to remove any grease that had spread from the guides onto the surface.
I used a thick silicone grease from a tube rather than a spray grease so I don't know if that will make a difference.MikeyH said:
As you're using a spray, and given the shape of the Z4 windows, I'd have the window most of the way up and spray the silicone grease down the edge of the glass, then drop the window - hopefully the window will smear it down the guide.
Failing that, on the Z4 it's simple enough to remove the door card and peel the membrane back, then you can obtain direct access to the guide from inside the door - see this thread
I left the window down for a couple of hours after a good spraying. Just went out to try it with the window up as suggested by PerryGunn, tried it first, guess what, no squeak. 
