i have a water leak when it rains. its coming in where the a and b pillars meet on the driver's side. if i'm in the car i can see a little stream come from the partline of the pillar plastic. any ideas on where this might be coming from? perhaps the sunroof? i checked the windshield, no gaps in the window trim.

 

I would look at the drain pipe from the sunroof. I had that happen on one of my hondas (yes I have a honda or two) the drain pipe was disconnected