Why does my car jerk when i brake?

Brake Pad Issues

Worn Brake Pads: Over time, brake pads wear down, leading to reduced friction and uneven braking, causing jerking sensations.

Uneven Wear: Uneven wear on brake pads can cause them to grab at the rotor unevenly, resulting in jerky stops.

Rotor Problems

Warped Rotors: Excessive heat or uneven cooling can warp brake rotors, causing vibrations and jerking when braking.

Rust or Corrosion: Rust or corrosion on the rotor surface can create uneven friction, leading to jerky braking.

Brake Caliper Issues

Sticking Caliper: A caliper that sticks or fails to release properly can cause uneven pressure on the brake pads, resulting in jerking when braking.

Caliper Slider Pins: Worn or seized caliper slider pins can prevent proper movement of the caliper, causing uneven braking and jerking.

Hydraulic System Problems

Brake Fluid Contamination: Contaminated brake fluid or air bubbles in the brake lines can lead to inconsistent brake pressure, causing jerking when braking.

Brake Line Leaks: Leaks in the brake lines can result in a loss of brake fluid pressure, leading to jerky braking and potential brake failure.

Suspension Issues

Worn Suspension Components: Worn or damaged suspension components can affect the stability of the vehicle during braking, resulting in jerking sensations.

Loose or Worn Bushings: Loose or worn bushings can allow excessive movement in the suspension, contributing to jerky braking.

What to Do?

Inspect Brake Components: Check brake pads, rotors, calipers, and brake lines for signs of wear, damage, or contamination.

Replace Worn Parts: Replace worn brake pads, warped rotors, sticking calipers, and damaged brake lines to restore smooth braking performance.

Flush Brake Fluid: Periodically flush and replace brake fluid to prevent contamination and maintain proper hydraulic function.

Inspect Suspension: Have the suspension system inspected for worn or damaged components, and replace as necessary to ensure stable braking.

Facts

Brake Fade: Intense braking or driving in mountainous terrain can cause brake fade, where the brakes lose effectiveness due to overheating, potentially leading to jerking sensations.

Regenerative Braking: Some hybrid and electric vehicles use regenerative braking, which converts kinetic energy into electrical energy to recharge the battery, but this system can also cause jerking sensations during deceleration.