Any common water leaks? Update posted. Need advise

[mdc1990zr1]

I replaced the third brake light gasket on my 14, x2. Didn't work. Clear chalk for bathroom tile. At the bottom of the third brake light cured the issue.

Can't see once it dries, stopped the leak.

I replaced the third brake light gasket with some heavy duty gasket from Detroit something or other, only to find that it didn't seal because my third brake light housing was warped. A member on here suggested I put new LED bulbs in the housing as they run cooler than the original bulbs. So I ordered a new OEM housing and replaced the bulbs with LED and I have been leak-free for a couple years now.

 

[Idledrummer]

it is raining now, removed backseat and insulation, and found the water, but not sure it is coming from third brake light, but it is definitely not from the vents. Will try your suggestions. It only leaks into the passenger side. I see some caulcking, maybe from previous owner.

 

[Atcer2018]

it is raining now, removed backseat and insulation, and found the water, but not sure it is coming from third brake light, but it is definitely not from the vents. Will try your suggestions. It only leaks into the passenger side. I see some caulcking, maybe from previous owner.

You narrowed it down to the 3rd brake light or rear window. I hope it’s not the window. I think that’s the rarest leak.

 

[EdGs]

If it's the sliding window, I believe the drain holes in the track get plugged up. Just a thought.

 

[nlambert182]

The caulking looks like seam sealer. If it is, that's from the factory.