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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Soaking wet rear passenger footwell



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      04-13-2018, 04:05 AM   #1
mayhs
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Soaking wet rear passenger footwell

Over the last few days when driving off I've heard a water trickle/bubbling sound coming from the rear seat area. Investigated further and found the entire rear passenger side footwell is soaked. I've soaked up loads of the water but after raining it fills up.

I've searched the forums and know about the vapour barrier leaking issue and also found a bit regarding leaking A/C ducts and sunroof drains.

However I cant see any signs of where the water would be coming in from. The carpets around the footwell are dry, even under the front door and B pillar and considering how much water accumulates I'd expect to see some signs of dampness on the carpets around the footwell.

I'm going to pull the door card off this weekend but just wondering if anyone else has come across this?

I've got a pre lci 330d saloon with the sunroof option by the way
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      04-13-2018, 04:22 AM   #2
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I'd guess that the sunroof drain is blocked. Either that or the vapour seal behind the door card.
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      04-13-2018, 06:47 AM   #3
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rubber around rear door is a common culprit also..
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      04-13-2018, 10:50 AM   #4
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Bit of a update. Came home and the floors soaked again but it seems the water is coming from the black plastic vent on the floor! Managed to wiggle it a little bit and could hear water sloshing around inside!
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      04-14-2018, 09:08 AM   #5
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Also noticed today that with the heating on I get hot air out of the front vents and rear centre console vents, but only get cold air coming out from the rear passenger heating duct from under the seat
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      04-14-2018, 09:42 AM   #6
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Rubber around the door is bad. Take it out and re-silecon it I had to do this to my e39,s.
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      04-14-2018, 04:04 PM   #7
mayhs
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Managed to get a bit of the trim off today. Turns out it was a blocked sunroof drain, water was running down the headliner and along the front door rubber seal and then pooling in the front and rear passenger seat floor. Pulled up a corner of the front carpet and managed to pump quite a bit of water out probably a few litres. The foam is still pretty damp/wet but might try to use a dehumidifier to dry out the cabin.

Ended up blowing some compressed air down the sunroof drain and it seems to have done the trick but need to remove the roof-lining and see where the sunroof drain actually runs.

Praying for a hot summer...
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      08-08-2018, 02:07 PM   #8
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More Water!

So another update to my troubles!

After the summer heat all the foam has finally dried out in the passenger front footwell. But after a bit of rain today I decided to check to make sure that the leak (thought to be from the sunroof drain) had fixed the issue but it hasn't.

It seems that the water is leaking from the side of the glove box, the sponge bit is damp however I have no idea how water can be leaking though the side panel. I've checked the drains inside the engine bay and they are clear.

Any ideas?
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      09-22-2018, 08:51 AM   #9
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Wondering if you ever definitively resolved your issue. Two days ago I was driving in a hard rain, and I heard the exact same trickling/bubbling sound. Last night I noticed that my drivers (left) rear foot well is soaking wet. The front is dry, and the right side front and back are dry. I plan to check all of the posted suspect areas later today, but any advice is appreciated. Thanks!
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      09-23-2018, 12:46 PM   #10
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Unfortunately not, but it seems (for now) that the water ingress has stopped and I've not noticed any more damp.

I would double check the front (left), just try and squeeze the carpet and listen out for water.
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