If you do a search on ebay there are people making window regulator repair kits that work perfectly for $20.00

http://www.realoem.com/bmw/diagrams/g/i/234.png

For those with the rattling front window issue, replace part # 7. BMW part #51338254781. There's 2 per door, but chances are only the one is cracked, worn out, or missing completely. These are the clips that hold the bottom of the window to the regulator. Once they break loose, they will cause the window to rattle when closing the doors.

The Hustler, coming through! At only a few dollars a piece, I'll have to give them a try...my front passenger door is embarrasing and I've had the panels off like 3 times now.

I changed both my front window regulators and 2 clips per window. They still seem to go up and down slow. Time to change the motor?

Or some lube

:iagree:.....Try that before replacing a motor.
....Although the motors on these windows dont usually crap out all too often.

Dont overtighten the bolt that holds that clip in place, otherwise you'll be at square one. The rattle you're hearing isn't so much the window hitting the regulator tracks, its likely the bolt threads hitting the window since the plastic clip no longer prevents the bolt from being in contact with the glass.

Its the cable and pulley that have the problems. Don't try WD40, get in there and throw in some actual grease, and be generous...roll it up and down, reapply, the wheels, cable, etc. There is really nothing you can do inside the window tracks without getting grease on the window itself, but I guess you could try there as well.

Yeah, it seemed pretty fragile while I was in there applying locktite to the bolts. I'll order those pieces you mentioned tomorrow and see what happens. I tried applying silicone, slamming the door to see where it transferred to the window, all to no avail.

I used Mobil 1 Synthetic grease on the tracks, cable, and pulley when I last went behind the panels. And the grease is no biggie since you can clean it off afterwards with little effort.

I've seen cable/pulley issues, as well as the clip that travels up and down the track cracking at the ends... But I cant recall a motor going out.

I've got the same stuff...love WalMart. I did MrBMWX5's reinforcement trick using some electrical wiring I had laying around, so now all that I've got left to fail is the pulleys.