Cricketts

The drain is below where you placed your hand in the second video. It most likely is plugged with tree leaves and debris. When open it drains just behind the wheel well. It is identical on both sides.
Good Luck

dazzler22

Got this exact issue in my e60 520d, scuttle drains are clear. So I'm guessing the culprit is the sun roof. Anyone got any pics of where the rear drains start? And they run out the rear wheel wells, is there an easy way to get to them or is it wheel and all out job?

Cheers Dazzler

dazzler22

Just to updated from my earlier post. After popping the covers off the pillars behind the driver's seat. I removed the roof handle and dropped the headlining. The drain is pretty much level with the back of the rear door.

I was able to get the headlining down enough to pull the pipe of the drain, there was water dripping from the sunroof already. I pulled the pipe of and At this point a good half pint of water came out..... (Seats where already out in the house drying so no bother)

With the pipe detached I got some pvc pipe (spare from fish take stuff) and pused it In to the rubber drain pipe. Then gave it a good blow! It was deff clogged load of resistance to start then blew clear.

Next I then attached me pipe to the white drain attachment on the sunroof and did the same.

Once reattached I pores some water in the drains and it now seems to be coming right out the rear arch.

Will do the other side in the week!

Hope this helps someone!

Cheers
Dazzler

Tabuki01

Same problem on my 2004 530i on the passenger seat

houbmw

I have a 2007 530i since new from June 2006 that has always been outside in Texas and Florida weather. I had 3 leaks at once. Huge amounts of water was collecting on the passenger rear side....found out the main leak was from the windshield cowl area. There is a drain apparently somewhere right underneath the windshield cowl and leaves and gunk can't collect their just like the sunroof drains. The water follows the path of the vent and comes in. It was staring because I had a small sunroof leak at the SAME time that was causing us to misdiagnose the leaks. We first took apart the headliner and replaced the sunroof seal, then we replaced the rear passenger vapor barrier. When none of that solved the issue, the shop took out the seats and carpet and find the leak. They traced it to the windshield cowl being incorrectly installed after a new windshield replacement back in 2014. The L7 rear passenger sub was soaked in water.

Summary: I had no standing water or evidence of previous water being anywhere near the rear trunk. The shop started by cleaning the sunroof drains, then replaced the sunroof seal, then replaced then rear passenger vapor barrier, then finally removed the interior to trace the leak to behind the windshield cowl. I ended up probably spending $3000 total to get all of this resolved over a period of 8 months. The shop took out my carpet and pads to dry them and get the cleaned. While trying the figure out the source of the water leak, I had mold accumulate on the seats since the car had to be stored during the hurricane in 2017 September in Florida.

Sucks but no more water leaks for now.

TeflonDon

Pictures would really be great about the exact source of the water leak... I'm about to take down my headliner this weekend....Any more information you have or pictures would be greatly appreciated.

jeffery

mine leaks on the rear floor from the sunroof to see if it’s your sunroof leaking just put some duct tape around it wait for the rain and see if it’s dry the drains run down the back