SqerrNipz said:Passenger window wouldn’t go up or down, so stripped the door apart to investigate. I’m no mechanic, but I think I found the issue - see pics :lol: Window regulator cable appears rusted through and although there’s no sign of water ingress, the door membranes have obviously been off before and stuck back with a combination of duct tape and what appeared to be decorators caulk :roll: Lots of scraping later and I was left with tonnes of sticky gunk, however auto-finesse tar and glue remover turned out to be my saviour. That stuff is magic and cleaned them up like new! Checked drivers side too and regulator seems fine, but membrane was last off in Roman times it appears as it was a mosaic, stuck on in about 20 different pieces.
2 new door membranes on order from BMW - £40.01 each. Ouch. Also noted a few broken doorcard clips, so new ones are also on order. Butyl tape arriving from amazon tomorrow to properly fix them down. While doorcards and membranes were off I decided to apply sound deadening to the door skins (inspired by a post on here and also Rob (Usel) who is always a bad influence when it comes to mods). I can confirm the ‘satisfying clunk test’ and overall feels much more solid when closing the door. Passenger door will follow once I get my hands on the new regulator as I figured it would be easier to apply with the regulator out, once I come to swap them.
For future reference for anyone else looking for new membranes: eBay BMW store does them £38 each and free postage.
[ref]SqerrNipz[/ref], hope the butyl tape works ok for you? I find it lifts away along the bottom edge, about 6 inches from the front where the metal kinks in.
On the recommendation of [ref]bigwinn[/ref] I now use Tec7 black sealant. Works a treat.






