A bit of a late response (only just joined this forum), but I had the same problem with my 2011 Z4 at 12 months old.
I had leaks on both A-pillars at the top. Water trickled down and over the doors/speakers.
Took it into my dealer - they said it was probably blocked drains, but they didn't mess around unblocking them - they replaced the seals for me under warranty. I've not had any problems with rain leaks since.
Hope that helps anybody having similar issues.
I had leaks on both A-pillars at the top. Water trickled down and over the doors/speakers.
Took it into my dealer - they said it was probably blocked drains, but they didn't mess around unblocking them - they replaced the seals for me under warranty. I've not had any problems with rain leaks since.
Hope that helps anybody having similar issues.