Help me find my leak
 

We have 05 X3 that is allowing rain water into the car. Specifically the water accumulated on the driver's side, rear at carpets. Enough was to soak a handtowel.

I had thought the washer fluid was re-leaking but now I know it was the rain.

This is the second time now after a rain storm. I noticed it as the condensation was building up on the Inside of the car.

I am guessing it may be coming down from the driverside B-pillar and into frame/floor but have no ideas. We have the moonroof.

Thanks

Check the moonroof drains and gutters...

I'd also pull off the rear door panels and see if there is a leak on the seals of the vapor barriers. The sealant holding the barriers in place may have warn out or were not laid down well and a leak may have finally pushed it's way through.

I had that occur and my rear carpet was soaked. Turned out I had not sealed it fully when I pulled it off to fix my drive dogs for my rear windows.

Hopefully that helps! Good luck!

Second what Gee3 says. You can check for a leak by opening the door then spraying water at the base of the window. You may see the water coming out from behind the door panel where it meets the metal door. On my X3 it flowed from there onto the plastic at the base of the rear seat then down into the floorboard.

I had the same leak. I had to replace the part that connects the window lift motor to the glass on my right rear door. I carefully pulled off the styrofoam-like vapor barrier while using a heat gun to soften the adhesive. I tried pushing it back in place and reusing the adhesive that came on the SAV but it developed a leak. I removed door panel again, peeled back the vaopr barrier where it was leaking along the bottom (no heat gun this time since seal was already broken) and applied Permatex Black Rubber Sealant I purchased at the local auto parts store. That was a couple months ago. So far its been water tight.

Chip