The driver side rear floor is drenched. The 4 sunroof drains seem to be draining.
Where else is the water coming from?

 

 

Thanks! I will pour some water down the outside, confirm that's where the water is coming in, then investigate how to take the door panel off and replace the inner membrane.
I was hoping, origially, that it was the rear sunroof drain, but all drains were passing water.

 

Had the same thing and the drains seemed to be draining fine. Problem I found was the drains were stopped up but were partially clogged in the frame. It's a pain and luckily I had a snake camera to use. The sunroof drains go into the frame and drain from there. The frame would drain but not fast enough. Had to clean the hole in the frame. The front drains can be accessed from the wheel well if you remove the running board. Pretty bad design I think.