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      03-04-2018, 10:10 AM   #1
TheBMWBuster
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2018 X3 G01 passenger side water leak

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My new X3 is leaking water from the front passenger pillar. It is coming out of the horizontal seam about an inch below the top of the dash and causing the carpet to get wet. The seam is hidden if the door is closed. The leak seems to occur when water is sprayed on the outer side front portion of the roof rail. I have an appointment scheduled for Monday and would like to know if anyone has anything information that would help in diagnosing and solving the problem.
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      03-04-2018, 10:57 AM   #2
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YIKESSS. Keep us posted
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      03-05-2018, 02:35 PM   #3
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I had your same exact problem with my (at the time, new) 2001 Audi S4. The cause to my issue was a clogged rain gutter drain, which had caused my inside front passenger footwell to get wet.

The dealer should quickly be able to diagnose your issue and either clear any clogs or to refit any weather seals. A real disappointment in a new car, but it's not too bad to resolve. Good luck!
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      05-24-2020, 10:09 PM   #4
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Any updates on this? My '19 X3 recently had a leak from the driver's side A pillar and microphone in the ceiling. It's never done this before and sits outside at work in rainstorms all the time. I was shocked and very upset. Everything dried out quickly with no lingering issues since it's been so hot here lately.

My X3 has 8,300 miles and is garage kept and never sits under trees. The sunroof drains are fine, front and rear. I've poured copious amounts of water into the rain gutters with the sunroof open and all four drains evacuate the water immediately. I can't seem to replicate the leak!

This leak occurred after a heavy downpour while I was parked sideways on a slight incline; the vehicle was essentially leaning to the left towards the driver's side. We were at a friend's house and the only place to park was along the edge of the ditch. My sunroof and doors were closed so that's not the culprit. I'm at a loss, especially given that I cannot replicate the issue even when pouring buckets of water onto the roof and windshield seams.

What do you think could have caused this? I've attached a picture of the water seeping from the A pillar.
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      05-25-2020, 07:37 AM   #5
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Sunroof drains would be my 1st guess since it's common to see water around the drivers phone mic and 2nd common issue, are the pano seals. Open the sun roof and inspect the drains on each corner. While there, inspect the seals around the pano roof.
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      05-25-2020, 11:54 AM   #6
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Quote:
Originally Posted by iwhineX3 View Post
Sunroof drains would be my 1st guess since it's common to see water around the drivers phone mic and 2nd common issue, are the pano seals. Open the sun roof and inspect the drains on each corner. While there, inspect the seals around the pano roof.
Thanks for the input! I appreciate it. The drains were my first thought, as well. I even replicated parking in the same position and poured water into the gutters and couldnít get it to leak. Iíve recalibrated the sunroof to ensure proper closing, but it appears that it was fine to begin with. The sunroof seals look fine as I treat them with non-silicone protectant and keep them wiped free of debris. There is literally nothing but a bit of pollen in the rain gutters; not even a speck of debris. I wouldnít expect any different being only a few months old and garage kept.

Could the car being parked tilted to the left have perhaps caused even properly functioning rain gutters/drains to become overwhelmed and leak water into the headliner during a heavy rain? Just a thought. Iíd hate to think that, but Iím running out of ideas. I also donít want my dealer taking stuff apart and risk panels/pieces not being reassembled properly. Plus, it doesnít look as though theyíll be able to recreate the leak anyway. Thanks again for any input!

Last edited by Khelms04; 05-25-2020 at 12:03 PM..
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      05-26-2020, 03:21 AM   #7
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My guess too would have been the sunroof drains, but it looks like you've tested them well. I'm sure I've read other thread/s with exactly the same location of leak as you describe. They turned out to be the sunroof drain in those cases.

Perhaps the hole where the roof rail attaches to the roof might not be properly sealed?

Is yours the original windscreen?

PLease let us know how you go..
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      05-26-2020, 03:48 AM   #8
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if it's any help, here's a diagram showing the drain holes, and pipes for the sunroof

https://www.realoem.com/bmw/enUS/sho...diagId=54_0562
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