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Water in battery compartment

Discussion in 'E46 (1999-2006)' started by HSViT, Jan 27, 2013.

    • Member

    HSViT

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    After recent rainstorms here in Alabama, I detailed my Sport Wagon. I discovered about 1/4 inch of water in the battery compartment! Anyone has had this problem? There is a small white rubber hose hanging, connected to what I guess is the outside of the fender. Any ideas how to find the leak? Thanks y'all.
    • Member

    HSViT

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    After another rainstorm, I discovered the source of the leak: water was filtering in around the rear windshield washer reservoir cap in the D pillar. A little silicone and the leak is gone. I have not discovered where the rubber hose goes. Do BMW batteries have some kind of vent?
    • Member
    • Technical Service Advisor

    charlson89

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    Yes all BMW batteries have vents to the outside.

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