The front brake rotors can warp and cause a vibration when braking. The rotors will need to be machined or in cases where they are worn to thin, replaced to correct this issue.Google+
Car Problem Reports
Honda Civic Si Warped Front Brake Rotors May Cause Vibration When Braking
Honda Civic Si Problem
Average Mileage: 46,633 mi (19,900 mi - 90,000 mi)
Visitor, 2012 Honda Civic Si, 19,900 mi
Rotors need repair. Unbelievable.
Visitor, 2006 Honda Civic Si
I have had this problem shortly into owning my brand new honda civic si 06, when it rains my brakes just don't seem to work, I have about gotten in so many accidents its ridiculous honda tried telling me it was just abs and i wasn't used to it. I plan to take it up there tomorrow bc i cant take it anymore!
replaced pads and rotors