Posibilities are
During braking
Warped brake discs (rotors)
Worn suspension components
Excessive play in a front wheel bearing
During normal driving
Wheels out of balance
Tyre out of shape
damaged road wheel.
have front suspension checked
possibilityThe car is out of alignment or you have a wheel out of balance.
Wheels require balancing.
have the tyre checked for balance
Tire our of balance or bent wheel. Have your tires rotated and balanced.
might have misaligned or loose wheels
the cuase of this is ussaully worped rotars
u have bad roters in front
Could be a problem with your torque converter
balance front tires
Cylinder miss, broken motor mount, or vacuum leak.
Cylinder misfire. Possibly failed or failing engine mounts.