Hello
If problem only occurs while braking it is the front brake rotors, they are warped. When applying brake pedal to warped rotors the calipers move back and forth on their mounts causing the vibration,depending on severity of warpage the rotors may be machined or replaced and be sure to replace pads the same time to assure proper repair. If you have any questions just ask.
If this helps hit ACCEPT...BONUSES AND POSITIVE FEEDBACK WELOCMED
If this helps PLEASE hit the ACCEPT button and Please Give POSITIVE FEEDBACK!!
BONUSES WELCOMED!Thanks