The other day I noticed that the back seat carpet and floor mats on both
sides of my wife's 2001 325i were soaked with water. I vacuumed up the
water and there was quite a bit, maybe 2-3 quarts. There appears to be a
"subfloor" which held most of the water.
I have been unable to figure out the source of the water. I have ruled out
an open window or spilled water bottle (neither would explain how the water
was on both sides). We drove several hours in a heavy rainstorm, but I
could find no visible leaks around the windows, doors or sunroof. Also I
cannot see any sign of water on the seats or headliner.
Could someone suggest the source of the water or explain the construction of
Windshield bottom seal, along the hood, my son 325is 94 had same problem
after 3 hours rainstorm.
Water gets to the AC blower housing and into the floor, the back is the
lower point, your front mats should be wet too, but not as bad as the ones
in the back.
Well in my 635, the front sunroof drain tubes were made of some type of
material that shrunk over the years and retracted inside the frame of
the car. So instead now the drains were filling up my rocker panels and
inside of the cabin as well. Can you locate the drain tubes and verify
how they are routed?
Oh and yeah, the front windscreen leaks are sooo common.
I will investigate the drain tubes. The sunroof was serviced a few months
ago, perhaps the drain tubes were knocked out of position.
I have not considered the windshield because the front carpet is dry but the
rear carpet is equally wet on both sides.
Thanks for the ideas.
check the door vapor barriers real well against door frame,if they are
not sealed properly, water will leak inside vehicle. if you have had a
window regulator replaced or body work done on a door. start
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