When a vehicle feels jerky during braking, there's a high likelihood of issues with the brake system's cut-off switch, burnt key switch contacts, poor contact or damage in the motor Hall line, malfunctioning controller, or uneven brake discs or brake pads. It's essential to visit a repair shop promptly based on the specific malfunction symptoms to eliminate any safety risks.
Braking is achieved through the intense friction between brake pads and brake drums. Inevitably, after extended periods of driving, a vehicle will undergo several braking processes. After braking, the brake disc can become extremely hot. When braking abruptly or engaging the ABS (which involves electronic-controlled pulsating braking), the brake calipers continuously tighten and relax on the brake disc. This intermittent forceful stretching can cause the brake disc to deform. When braking to decelerate, heat is generated.
Generating excessive heat can deform the brake rotor, leading to a wavy deformation of the brake disc. Consequently, during high-speed braking, when the brake disc is restrained by the brake caliper, an uneven disc will vibrate. This vibration is then transmitted to the car body and steering wheel through the steering tie rods and suspension, causing body vibration or steering instability.
Furthermore, aside from the brake disc causing the car body to shake during braking, the fault could also be due to worn-out suspension components, worn bushings, or damaged shock absorbers.
