What causes the car body to shake when braking?

[OAdriel]

The reason for the car body shaking when braking is the uneven surface of the brake disc. In such cases, the brake disc needs to be replaced. The car's braking system consists of the master brake cylinder, vacuum booster pump, brake slave cylinder, brake pads, and brake disc. When the brake pedal is pressed, the vacuum booster pump provides assistance, making it easier for the driver to press the brake pedal. Braking is the response that stops or reduces the speed of moving locomotives, vehicles, and other transportation tools or machinery. The principle of most braking systems involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force.

[Morris]

I've been driving for many years and have encountered quite a few instances of car body shaking during braking. The most common cause is warped or unevenly worn brake rotors, which create uneven contact between the rotor and pads during braking, resulting in vibration. Wheel imbalance is another potential culprit - if tires wear unevenly or wheel balancing isn't done properly, the shaking becomes more noticeable during high-speed braking. Suspension system issues might also contribute, such as aging shock absorbers losing their supportive capacity. Don't underestimate this vibration - it accelerates brake component wear, increases stopping distance, and poses significant safety risks. I recommend getting it checked at a repair shop as soon as possible. Technicians can use professional tools to inspect rotor flatness and perform resurfacing or replacement if needed. Try to avoid sudden braking during normal driving to help prevent such issues.

[Willis]

I just dealt with this issue a few days ago—the car wobbling when braking is really annoying. The main causes are usually unevenly worn brake pads or air in the brake system causing unstable hydraulic pressure. Poor wheel balance can also lead to this, especially making the shaking worse at high speeds. A stuck gear system might exacerbate the problem. This kind of shaking not only affects driving comfort but can also cause the car to pull to one side when braking, doubling the risk in foggy weather or on mountain roads. It’s best to quickly find a reliable auto shop for diagnostics, such as checking brake disc thickness and tire balance. Personally, I make it a habit to regularly check tire pressure and brake condition, and I drive slower, coasting more and braking less to extend their lifespan.

[DeLaila]

Brake shudder is mostly caused by warped brake discs. Frequent hard braking can easily lead to uneven disc surfaces, resulting in uneven friction and vibration during braking. Wheel imbalance and loose suspension are also common contributing factors. If tires are excessively worn or have significant dynamic balance deviation, high-speed braking vibrations will intensify. These issues may seem minor but hide risks of extended braking distances, becoming more dangerous in rainy conditions. During maintenance, check disc flatness and replace or resurface as needed. Regularly inspect tire balance and suspension bolts during routine maintenance for preventive measures.