[roblese90]

My 2012 e91 has had the carpet soaked right below the dead pedal after rain or a car wash. I have already unclogged the sunroof drains and checked the vapor barrier which was intact and still glued. What else could be the culprit?

[StradaRedlands]

Check the gasket around your side marker/blinker, could be allowing ingress there.

[Bims328i]

Even after clearing my passenger side front drain I removed the drain hose from the sunroof assembly and blew in it. You could feel something clear out of the tube.

I'm still curious if this is the case for all E90 or if I am missing some seals but the cassette assembly from what I can tell, just has the tray lip.

If water manages to overflow that front area it will just spill over onto the headliner.

Depending on the tilt of the car it may leak down the front, middle or rear pillar.

The back section is no better as it is even lower sidewall guide (about 1") before any pooling water would overflow onto the headliner.

Perhaps you could put a piece of paper towel between that area in the image and see if it gets wet after a carwash or rain.

From what I can tell it is just an empty space between the lip of the water guide and the roof of the car.

The only part that seems to have a seal is along the back of the assembly which was present after dropping my headliner.

Hope you get it sorted out!

[eljay]

Also check the windshield cowl seal. See my thread for detailed pics:
https://www.e90post.com/forums/showt...495946&page=22

[Cal122]

Also a bit obvious, but since it wasn't mentioned, ensure the leaf drains in the corners under the hood are clean as well.

I've also had the door vapor barrier look like it was fully sealed, but still some water either made it around the seal or came in through holes in the door where the door clips mount (the rubber seals on the back of the door clips help seal the holes). Water dripped onto the door sill and would immediately roll into the front footwell. A good trick is to line your door sills (and underneath your pedals) with paper towels and then either use a hose or go through a touchless car wash to see where the stream of water originates from.

I had to clean my sunroof drains from underneath the car, nothing would push the mud/debris through from above. After that, you could dump an entire water bottle into the corners of the sunroof and it all instantly drained out (Before, half the bottle would make it through before water stopped draining, so originally I thought they were clean).

[e90tt335i]

A friend of mine had a slight leak in the front windshield that was getting the carpet wet, check the seals on windshield

[oVeRdOsE.]

Originally Posted by e90tt335i

A friend of mine had a slight leak in the front windshield that was getting the carpet wet, check the seals on windshield

mine was the inner seal at the top of the windshield, destroyed by the sun, it misses part since it was dry like sand. (Note it was on my f25, the seal is not replaceable)

Of course after Ive checked : sunroof seal, sunroof drain (tested it with milk) and fender strainers

I use a liquid silicone, but I wont recommend it if you want a nice job.
Very if you want to save money and dont want to replace the top seal or even the windshield.

Why you want to use it :
- cheap
- works.

Why you DONT want to use it :
- even if not noticeable from far, you can see it.
- Will get the job harder if you replace the windshield in future.
- In winter, or colder days, it's hard and make creak noise in the cabin.
- Probably a good way to crack the windshield if the silicone is too hard.
- questionable durability. TBD

https://www.permatex.com/products/ad...sealer-1-5-oz/

[crashoverride]

A very common cause is the door seal. A seatbelt hangs out car and door and gets shut on it when closing door or the rubbing and wearing by your jeans sliding in and out of the car etc... which wears holes in the rubber door seal. It's odd, one would think the door keeps the water out but water passes between the door and car body, it's the rubber seal that keeps the water out.

The way modern sunroofs are made it's rare to have a leak come from the sunroof. They are made so that the opening is larger than the surrounding gutter and body so that should the rubber seal fail the water drops onto the surrounding metal gutters. Where as an aftermarket sunroof which is getting rare these days relies on the rubber to seal and any intrusion as the opening is same size as hole and has no fallback and easily leaks.