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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 06-08-2012, 01:16 AM
BostonCEO BostonCEO is offline
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Water keeps leaking somehow in the passenger floor every time it's rains.

its weird because nothing else gets wet but the passenger side floor.I had my mechanic check the drains in the sunroof along with the ones under the hood.He says they aren't clogged and as I'm in a wheelchair it's hard for me to check myself.What else do you think the problem can be?
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  #2  
Old 06-08-2012, 09:48 AM
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Boing745 Boing745 is offline
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i had the same problem and never found out what the problem was, many threads on here talk about the same thing and no answer, atleast i havent found one
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  #3  
Old 06-08-2012, 03:22 PM
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pkathee pkathee is offline
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Search button is your best friend..........


Anyway, common problem with E65/ E66. Leak is originating from clogged microfilter drain hole on passenger side.....

Read ENTIRE thread below;

http://www.bimmerfest.com/forums/sho...ght=water+leak

Especially from Post #15.
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  #4  
Old 06-08-2012, 04:19 PM
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Rookie2008 Rookie2008 is offline
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I had that problem it ended up being my sun roof wasn't closing properly.
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  #5  
Old 06-16-2012, 01:32 AM
hyperbeamer hyperbeamer is offline
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I had the same issue where water will pool on the floor rest of the left passenger seat. Sent the car in to an authorised workshop, and they fixed it. Said it was some leaves clogging up some drainage system and told me to stop parking under trees and clear the dead leaves and twigs. Cost me about 150 USD to fix it.
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  #6  
Old 07-03-2012, 11:48 AM
BostonCEO BostonCEO is offline
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Thanks for the input guys.I honestly have been super frustrated trying to find a solution.I've brought it to 2 shops who both said they cleared the drain.Yet still getting flooding.About to read into the above link to see if i find anything.
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  #7  
Old 07-03-2012, 05:34 PM
mikewerks mikewerks is offline
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What about the sunroof drains?? Check the flow there as well.
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  #8  
Old 08-05-2014, 03:37 PM
ayanteeque ayanteeque is offline
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The link can't be found. How do I check the drain?


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  #9  
Old 08-05-2014, 04:05 PM
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Their is a tis on this subject. Also many post on clearing sunroof drains. Google is also a good friend

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  #10  
Old 08-06-2014, 10:59 AM
meangreen94z meangreen94z is offline
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The micro filter drain the above poster is talking about, can be accessed by removing the rear section of the passenger front wheel well liner. The drain flap gets blocked with debris. If that's what it is(semi common), its tricky to track. Water running off the windshield drains below the the microfilter housings. If the drain on the passenger side is blocked, water will build up around the electronics box under the passenger side microfilter. There is a drain on the bottom of the e-box that has a check valve, which doesn't seal in standing water. Water leaks past the check valve up into the e-box. The e-box has a fan to to cool the electronics. The fan circulates air in through a duct above the passenger footwell in the interior. This is the path the water will take.(Im a BMW master tech btw)

Tell them to run water around the e-box/passenger microfilter housing. If water backs up around the ebox, this is your problem. Just cut the flap off the drain behind the wheel well liner and clean out the debris.
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