Back seat flooding please help

Lech91 · 11-21-2011, 11:10 PM

It's been 2 months since i first noticed my rear left seat all wet, i removed it, and found it all flooded, ive noticed it only gets wet when i drive, i can leave it under the rain and no water comes in, i've sealed the whole chassis under the seats with a spray undercoat, and no luck, there's no sign of water coming from doors or roof; i also found a green feet-long plastic piece with a fuel sign on it that i don't know where should be placed, i just found it floating under the seats (im trying to upload a pic, but my ipad wony let me)
Anyone with any ideas or solutions, or similar problems, please help

Ps: didn't knew where to place this post, sorry if it's misplaced

My car is a 120i 2007 hatchback

Dackelone · 11-22-2011, 03:22 AM

Does your car have a sunroof? Maybe it is one of the s/r drains ?

Lech91 · 11-22-2011, 05:39 AM

No, it doesn't have a sun roof

m_thompson · 11-22-2011, 09:55 AM

There was an issue with the alignment of the A/C evaporator drain on some models. Under certain conditions the condensate would not go down the drain and would go under the carpet.

DriveHard · 11-22-2011, 10:17 AM

Also the door panels... If you had any work done in the windows..

There is a vapor barrier that is adheared to the door with butyl tape.. unless the butyl is replaced after working on the car, it never really seals correctly.

also the clips that hold the door panel on have rubber washers that seal the holes.. they need to be on also.

BMW designed there door so that water actuall travels thru the door and out the holes at the bottom.. hence the lines on our rockers as the stuff flushes thru over time..

1 bad vapor barrier can flood the inside of a car 2 or 3 inches in 1 good storm..

good luck..

Lech91 · 11-23-2011, 06:29 AM

I managed to fix the problem, there was a leak on the chasis right behind the door, i simply used some spray sealant; thank you for your replies,
I'm still wondering about the green feet-long plastic piece with a fuel sign on it, haven't found where it goes

Lester · 11-23-2011, 06:51 AM

Quote:

Originally Posted by Lech91

I managed to fix the problem, there was a leak on the chasis right behind the door, i simply used some spray sealant; thank you for your replies,
I'm still wondering about the green feet-long plastic piece with a fuel sign on it, haven't found where it goes

Can you take a picture of it? It might be something used during manufacturing.

Lech91 · 11-23-2011, 08:01 AM

Can you give me a email address? Im using an ipad and cant post pics

DriveHard · 11-23-2011, 09:05 AM

Quote:

Originally Posted by Lester

Can you take a picture of it? It might be something used during manufacturing.

is that the trunk mounted emergency fuel door release strap ???

Lech91 · 11-23-2011, 10:29 AM

Yes it is! Thank you so much for your help, i still dont know why is it lying under the rear seats, but at least i know what it is

11-21-2011, 11:10 PM	#1
Lech91 New Member 3 Rep 5 Posts Drives: 120i Join Date: Nov 2011 Location: Panama iTrader: (0)	Back seat flooding please help It's been 2 months since i first noticed my rear left seat all wet, i removed it, and found it all flooded, ive noticed it only gets wet when i drive, i can leave it under the rain and no water comes in, i've sealed the whole chassis under the seats with a spray undercoat, and no luck, there's no sign of water coming from doors or roof; i also found a green feet-long plastic piece with a fuel sign on it that i don't know where should be placed, i just found it floating under the seats (im trying to upload a pic, but my ipad wony let me) Anyone with any ideas or solutions, or similar problems, please help Ps: didn't knew where to place this post, sorry if it's misplaced My car is a 120i 2007 hatchback
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11-22-2011, 03:22 AM	#2
Dackelone European Editor 10526 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	Does your car have a sunroof? Maybe it is one of the s/r drains ?
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11-22-2011, 05:39 AM	#3
Lech91 New Member 3 Rep 5 Posts Drives: 120i Join Date: Nov 2011 Location: Panama iTrader: (0)	No, it doesn't have a sun roof
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11-22-2011, 09:55 AM	#4
m_thompson Major 133 Rep 1,416 Posts Drives: M-Sport 128i, 328xi, 3.0CS Join Date: Jun 2008 Location: New England, USA iTrader: (0) Garage List 2009 128i [0.00] 1972 3.0CS [10.00]	There was an issue with the alignment of the A/C evaporator drain on some models. Under certain conditions the condensate would not go down the drain and would go under the carpet. __________________ '09 128i - Black Sapphire Metallic\Coral Red\Glacier Silver\N51 DISA\6MT\Navigation\Premium\M-Sport\Heated seats\Xenon\Headlights\iPod\Smartphone\Euro Delivery
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11-22-2011, 10:17 AM	#5
DriveHard Colonel 115 Rep 1,998 Posts Drives: X1 and R58 JCW Join Date: Aug 2010 Location: Long Island iTrader: (0)	Also the door panels... If you had any work done in the windows.. There is a vapor barrier that is adheared to the door with butyl tape.. unless the butyl is replaced after working on the car, it never really seals correctly. also the clips that hold the door panel on have rubber washers that seal the holes.. they need to be on also. BMW designed there door so that water actuall travels thru the door and out the holes at the bottom.. hence the lines on our rockers as the stuff flushes thru over time.. 1 bad vapor barrier can flood the inside of a car 2 or 3 inches in 1 good storm.. good luck.. __________________ X1, R58 JCW, M2 in my future if planets align
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11-23-2011, 06:29 AM	#6
Lech91 New Member 3 Rep 5 Posts Drives: 120i Join Date: Nov 2011 Location: Panama iTrader: (0)	Thanks I managed to fix the problem, there was a leak on the chasis right behind the door, i simply used some spray sealant; thank you for your replies, I'm still wondering about the green feet-long plastic piece with a fuel sign on it, haven't found where it goes
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11-23-2011, 08:01 AM	#8
Lech91 New Member 3 Rep 5 Posts Drives: 120i Join Date: Nov 2011 Location: Panama iTrader: (0)	Can you give me a email address? Im using an ipad and cant post pics
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11-23-2011, 10:29 AM	#10
Lech91 New Member 3 Rep 5 Posts Drives: 120i Join Date: Nov 2011 Location: Panama iTrader: (0)	Yes it is! Thank you so much for your help, i still dont know why is it lying under the rear seats, but at least i know what it is
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