[ACH123]

Originally Posted by val2000

I had this problem about two years ago wet carpet on the driver side. The problem was the drain for air condition was clogged

Yeah I think that's exactly what's causing mine, no issues during the entire winter since I never used the A/C. I did come across this during a quick google search: https://www.tsbsearch.com/BMW/SI-B64-04-21 <- Seems like BMW's official service info bulletin

[val2000]

What I did is I put the car on the lift on the passenger side between the transmission and the body of the car that has a robber drain line. It’s hard to see but it’s there. you need something to slide in and clean it.

[ACH123]

Originally Posted by val2000

What I did is I put the car on the lift on the passenger side between the transmission and the body of the car that has a robber drain line. It’s hard to see but it’s there. you need something to slide in and clean it.

Gotcha, do you happen to still have pictures from it? Did you have to replace anything?

[val2000]

No, I don’t have the picture, nothing to replace. You just need to clean rubber drain line. you can use air with a long nozzle.

[val2000]

Here’s the picture under the car next to the transmission