kfet

2013 ford edge limited. 15,000 miles. when i press the brake pedal, the pedal vibrates a little bit. this happens pretty much every time the pedal is pressed. it's not a shake like something is warped. it's more of a buzz/vibrate electronically made. is this normal? i haven't taken it to a dealership to get them to look at it yet. i'm pretty sure they're going to try to tell me that it's normal. i've owned many vehicles before, and i've never had this happen.