Slight vibration when braking
a) the brake is going;
b) alignment is getting out of whack somehow;
c) tire problem; or
d) or a whole lot more that I need to worry about?
Again, it's some slight vibration that I don't think it's a major safety concern so I will likely bring it up to the mechanics during the next oil change (about 1500 miles or 1.5 month to go).