Why does car shake when applying brakes?
If the steering wheel shakes, but to car doesn't, when applying
brakes - your front rotors are warped (if you have disc
brakes)...if you have drum brakes, the drum could be cracked or the
pads worn unevenly If the whole car shakes, and the steering wheel
only seems to react to that, when applying brakes - see above
statement, but apply to the rear end. If the whole car shakes,
including the steering wheel - all four corners are bad, and you're
an accident looking for a place to happen soon. In any case, go to
your nearest service center ASAP.