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Why does your car shake when you hit the brake?

There are several reasons why your car might shake when you hit the brake. Some of the most common causes include:

1. Warped brake rotors. This is one of the most common causes of brake vibration. When brake rotors get warped, they can cause the brake pads to vibrate, which in turn causes the steering wheel and the rest of the car to shake. Warping can occur due to excessive heat, uneven wear, or other factors.

2. Unbalanced tires. Unbalanced tires can also cause the car to shake when you brake. This is because unbalanced tires cause the wheels to wobble, which can transfer vibrations to the steering wheel and the rest of the car.

3. Loose wheel bearings. Loose wheel bearings can also cause the car to shake when you brake. This is because loose wheel bearings allow the wheels to move around, which can cause the brakes to vibrate.

4. Faulty suspension components. Faulty suspension components, such as worn-out shocks or struts, can also cause the car to shake when you brake. This is because faulty suspension components can allow the wheels to bounce, which can in turn cause the brakes to vibrate.

If you are experiencing brake vibration, it is important to have your car inspected by a qualified mechanic to determine the cause and have it repaired. Driving with brakes that are vibrating can be dangerous, as it can reduce your ability to stop the car safely.