wakame

i have a 2011 rx450h, bought it about 3 months ago. When I first purchase it, the car was solid, no noise at all. After 3 months of driving, it developed a really horrible noise. Every time I apply brake, I can hear this tick/tack noise from either the b-pillar or the door panel. At first I thought it was coming from the window motor since I had a problem with it not closing. After the dealership replace the motor, the tick/tack noise still there. This happen during braking and go over a hump, when I drive on a smooth surface, the noise doesn't occur. Is this the b-pillar rattle that everyone is talking about or I have something else that's wrong?

A few days ago when the temp when passed 80, the part that connects the mirror to the windshield started rattling, like how sands hit the windshield when you drive on the highway, once I press on it, the rattle goes away. Anyone seen this before?