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rain in back floor board of 5 series - E39

Discussion in 'Member Introductions' started by 024492, Aug 13, 2012.

    • Member

    024492 '73 - 2002

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    Hello, I have rain coming in my rear doors - 2003 5 series with M sport package. Only when heavy downpour and then it collects inside in the rear passenger foot well (both sides). I can't localize it but it seems to be coming from the seals (all look good to me), not from the ceiling or from undercarriage. Any help is apprecitaed on solving. Thanks, Peter
    • Member

    MGarrison

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    Lots of possibilities, make sure your sunroof drains are clear.
    • Member

    eblue540 Fourth Gen Bimmers

    Post Count: 291
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    Ever had your window regulators replaced on either rear door? Maybe a prrior owner? If so, good chance that the moisture barrier liner was not properly resealed when they put the door back together.

    Test this way: sit inside the car. Have a helper run a hose one the window of a rear door, full gushing flow of the hose. In a few minutes, look for a trickle coming in from the bottom o the door into the interior of the car.

    Pretty easy DIY fix if this is it. Let us know.
    • Member

    brucembergeron

    Post Count: 73
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    It's most likely the moisture barrier inside the rear doors. I've had a few E39's and all of them have suffered from this problem. I agree it's a DIY repair, there are videos on YouTube that show the process well. Otherwise I suggest finding an independent BMW tech and they can do it in about an hour per door.

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