Water build up rear passenger floor
#11
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Model Year: 2004
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Check the drains for your evaporator, they're near the center of the car. If you're getting water buildup even when it isn't raining, and you haven't been washing the car, then there's only one other source of water that I can think of and it's the A/C evaporator.
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I was getting a puddle in rear passenger side floor board. Removed rear fender liners and pulled out the rubber grommets and all is good now. Rear passenger grommet was clogged so the lines were backing up.
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Thank you for the response,
I have checked all of the seals and drains and they seem to look like they are in great condition. Later this week I am going to pour some water with dye over each of the seals, wait to see if the water on the floor board starts to change color, at least then I can isolate the area. The moisture issue has gotten worse over the last few days. 3/4" builds up, I'll vacuum and even if it isn't raining, or lightly sprinkling, water builds back up to about 3/4". Could it be built up somewhere and just pouring out when the present water gets vacuumed out?
I have checked all of the seals and drains and they seem to look like they are in great condition. Later this week I am going to pour some water with dye over each of the seals, wait to see if the water on the floor board starts to change color, at least then I can isolate the area. The moisture issue has gotten worse over the last few days. 3/4" builds up, I'll vacuum and even if it isn't raining, or lightly sprinkling, water builds back up to about 3/4". Could it be built up somewhere and just pouring out when the present water gets vacuumed out?
The next two front sunroof drains exit under the top front door hinges,, and drain out inside the door jamb out the gap btw the door and fender at the bottom corner of the door.
Park the car front downward like down the driveway. Open the sunroof pour water down both side tracks and the water will come out at the bottom front corner of the door. Those drains rarely clog, because they dont have the rubber piece on the end. like the rear and cabin filter drains.
The last two rear sunroof drains. Park the car pionted up the driveway pour water down the tracks the water will exit under the rear well covers and out behind the rear wheels. If water don't immidiately drain out ..Remove the wheel take out the plastic cover roughly at the top of the wheel well look up and youll see a cross shaped rubber piece remove it and Toss it, its prolly clogged. . Get some weed wacker wire about three feet run it up the drain till u feell the wire bump the top of the sunroof cartrage..Blow gently with air, then water test they should drain instantly ....
Once u done all that , the drains are clean and will function properly , and can rule out all the drains. That will prolly take care of the problem ... Check out this thread,,, http://www.bimmerfest.com/forums/sho...d.php?t=691644
One more thing , relocate the modules under the spare tire inside the styrofoam flat cover. They relocate to the sides behind the trunk side covers. I would do that ASAP. !!.. Since your getting water in the car.
Last edited by H F; 02-24-2014 at 09:16 PM.
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Many BMW vehicles come with this built in feature - a mini-bathtub. Water is replenished after it rains. \I'm surprised the dealer didn't explain this unique and absolutely free feature! You are not alone, mine floods all the time. Can't reach the rear sun roof drains. The BMW dealer is happy to clean them for several hundred dollars.
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Many BMW vehicles come with this built in feature - a mini-bathtub. Water is replenished after it rains. \I'm surprised the dealer didn't explain this unique and absolutely free feature! You are not alone, mine floods all the time. Can't reach the rear sun roof drains. The BMW dealer is happy to clean them for several hundred dollars.
My 545i 2004 had water under the back seat on one side. Removing that drain plugs has dried out the car and no longer do my back windows steam up. Took a few weeks running around with the AC turned on to dry out.
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