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Why would the brake pedal shake?

* Warped rotors. Warped rotors can cause the brake pedal to shake or pulsate when you apply the brakes. This is because the warped rotors cause the brake pads to vibrate, which in turn causes the brake pedal to shake.

* Uneven tire wear. Uneven tire wear can also cause the brake pedal to shake. This is because the uneven tire wear causes the tires to grip the road unevenly, which can cause the vehicle to pull to one side and the brake pedal to shake.

* Faulty brake calipers. Faulty brake calipers can also cause the brake pedal to shake. This is because the faulty calipers can cause the brake pads to drag on the rotors, which can cause the brake pedal to shake.

* Loose lug nuts. Loose lug nuts can also cause the brake pedal to shake. This is because the loose lug nuts can cause the wheel to wobble, which can in turn cause the brake pedal to shake.

* Bad wheel bearings. Bad wheel bearings can also cause the brake pedal to shake. This is because the bad wheel bearings can cause the wheel to wobble, which can in turn cause the brake pedal to shake.