What is the reason for noticeable jerking during sudden braking?

From a driver’s perspective, jerking during sudden braking often feels like a pulsation through the pedal or steering wheel. This is usually due to warped discs or an ABS intervention. If the car pulls to one side, uneven brake pad wear or a sticking caliper could be the culprit. A quick check involves braking at low speeds—if the issue repeats, a garage visit is advisable.

Noticeable jerking during sudden braking is typically caused by issues with the braking system or suspension components. The most common reasons include warped brake discs, unevenly worn brake pads, a malfunctioning ABS (anti-lock braking system), or worn suspension bushings.

Warped brake discs create an uneven surface, causing the brake pads to grip inconsistently and produce a jerking sensation. Unevenly worn pads can lead to similar issues. The ABS, designed to prevent wheel lock-up, may cause pulsations if it activates abruptly or malfunctions. Worn suspension bushings or shocks can also amplify vibrations felt during braking.

To diagnose the issue:

1. Inspect brake discs and pads for wear or warping.
2. Check the ABS system for faults using an OBD scanner.
3. Examine suspension components for excessive play or wear.

If the problem persists, consult a professional mechanic to avoid compromising safety.

The reason for jerking during sudden braking may be due to the engine speed and clutch plate speed being out of sync, foreign objects on the brake discs, or issues with the brake pads. Below are the specific causes and solutions:

Engine and clutch plate speed out of sync:

If the vehicle is manual transmission and jerking occurs during braking, it is likely caused by the engine speed and clutch plate speed being out of sync. When braking, the driver should simultaneously press the clutch and brake to perform the braking action.

Foreign objects on the brake discs:

Especially after driving in rainy or snowy weather, promptly check the brake discs for any foreign objects. If foreign objects are found, they should be removed immediately. Otherwise, it will not only cause braking jerking but also significantly reduce the vehicle's safety.

Issues with the brake pads:

Owners should regularly inspect and replace the brake pads. The need for replacement can be determined by the wear condition of the brake pads. When the brake pad thickness is only about 1/3 of the original thickness (approximately 0.5 cm), it indicates that replacement is needed.