I have had my car for just under a month. I have been through some rain and washed it 3 times. Today because of the long line at the hand wash I opted to go through the mop wash( regretful now) I'm sitting in my car when it gets out and my son is screaming in the back my car is all wet. I look back and see the rear pillar and then the center pillar soaking wet. I freak out thinking he opened his window when we went through, not the case. I see nothing wrong with any of the weather strip around the windows including the rear. Any ideas where to look next and in the the future I will avoid the mops.

 

Bad sunroof seal. Also check your sunroof drains. May be plugged. Do search. Both common issues.