Water everywhere!!!!

I have a 2000 528i. My driver side rear floor always fills up with water, up to 7" when it rains long and hard. I was wondering if anyone else has had similiar problems. If so how can i fix it? is it a hose from the sunroof?

I would check your vapor barrier behind your door pannel first. Infact I had to figure out why water was getting into the back right pasanger seat carpet. First thing I did was check the vapor barrier and sure enough the black stickie stuff was all unglued and the foam seals around the door pannel clips was missing.

well its a 2000 so i doubt its the rear window seals but anythings possibly,could be the vapor barrier and also the sunroof hose which may be clugged up in the hose or have a leak clogs more likely tho u can try and blow it out with a air nozzle if this is the prob.