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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 01-27-2013, 01:22 PM
HSV HSV is offline
HSV iT
Location: Madison AL
 
Join Date: Jan 2013
Posts: 4
Mein Auto: 2001 325i Sport Wagon
Water in Battery Compart

After recent rainstorms here in Alabama, I detailed my 2001 E46 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.
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Old 01-27-2013, 01:31 PM
JKRIT JKRIT is online now
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Location: Hollis, NH
 
Join Date: Feb 2008
Posts: 482
Mein Auto: '03 525i
With a helper, one person watches the inside while the other one sprays water from the outside at the hatch seals, window seals and the gas filler area. Another possibility is that a "body plug" may have fallen out; there is one roughly bumper height on the back side of the box. If this plug is missing, water can spray into the battery box when driving in the rain.

A third possibility is that rear window washer fluid has leaked into the battery box. The tank is above the battery behind a panel. Most battery vent tubes are black, so the white hose you found may be a disconnected hose in the washer system.
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