If your brake pedal feels like it’s pulsing or pausing, you might have brake Disc Thickness Variation (DTV). This is a small variation in the thickness of the fiction rotor plates. This is usually cause by the rotors receiving uneven wear.
Disc Thickness Variation causes:
Pedal pulsation, which occurs when the rotor rotates through the brake pads and calipers. It is more noticeable with heavy brakes
Steering wheel oscillation (shaking or shuddering)
Vibration, the thin and thick sections of the rotor slip in between brake rotors
How to Prevent Disc Thickness variation?
Install brake system properly, especially brake rotors, pads, and calipers
Clean the wheels and rotors thoroughly
Use a wrench to tighten the lug nuts to ensure lug nut torque