I have a 1-month old 2010 honda civic (with only 2,000 miles on it) and on two occasions, i noticed the brake pedal was shaking (or rattling) as I stepping down on it. I wasn't making a sudden brake or anything, just normal. I remember the second time it happened, i was making a usual full stop downhill and it was raining. The first time it happened, it was not raining, but I wasn't sure if i was going downhill. Any ideas? Thanks.

 

It's under warranty,take it in.

 

I think its better to get it checked by the dealer.he can tell you the right thing.