In daily life, the following indicators can be used to determine whether there is a problem with the brake pads:

Increase of Braking distance: If you find that the Braking distance of the vehicle increases significantly when you step on the brake, even if you step on the brake pedal forcefully, this may mean that the brake pads have been severely worn or failed.
Abnormal noise when braking: If you hear a sharp metal friction, gurgling, or hissing sound when pressing the brake pedal, it may be that the brake pads have worn to their limit and need to be replaced.
Shaking or vibration during braking: If you feel the vehicle shaking or the brake pedal shaking when you press the brake pedal, it may be caused by an imbalance or mismatch between the brake pads and brake discs, which needs to be adjusted or replaced.
Uneven braking force during braking: If you feel the vehicle tilting or unstable during braking, with strong braking force on one side and weak braking force on the other, it may be due to uneven wear of the brake pads or problems with the braking system.

The following are two real examples to demonstrate the danger of brake pad problems:
Accident case: When a car was driving on the expressway, the vehicle in front suddenly stopped, and the driver suddenly braked, but the Braking distance was significantly extended, which made it impossible to stop in time, and finally a rear end collision occurred. After investigation, it was found that the brake pads of the car were severely worn and lost their braking effect, which was the main cause of the accident.
High speed out of control case: When a car was driving on the highway, the driver suddenly found that the brake of the car failed and could not control the speed. Due to the complete failure of the brake pads, the vehicle was unable to slow down, ultimately causing it to lose control and collide with the roadside guardrail, resulting in a serious car accident. After inspection, it was found that the brake pads were severely worn and unable to provide sufficient braking force.
The above two examples indicate that the danger of brake pad problems cannot be ignored. If there is a problem with the brake pad, it will lead to the extension of the Braking distance, brake failure or even the loss of control of the vehicle, which will bring huge safety risks to drivers and pedestrians around. Therefore, regularly checking the wear level of brake pads and replacing them in a timely manner is an important measure to ensure driving safety