Why Does a Car's Brake Feel Soft?

[SiennaFitz]

1. Air in the Brake Lines: Brake fluid is the medium that transmits force in the braking system. If air enters the brake lines, the brake fluid under high pressure will appear insufficient in strength. Although braking force still exists, the maximum braking force is significantly reduced. In this case, the brake system should be bled promptly at a repair facility. To determine if there is air in the brake lines, press the brake pedal several times with the engine off until the brake becomes firm, then hold the pedal down. If it remains firm, the system is normal; if the pedal slowly sinks, it indicates air has entered the brake system. 2. Brake Fluid Not Replaced for a Long Time: If brake fluid is not replaced in time, it will contain excessive impurities and moisture, which will affect the transmission of braking force. Therefore, brake fluid should be replaced regularly. If possible, have the moisture content of the brake fluid tested at a repair facility. 3. Oil Leakage or Soft Brake Material: Generally, oil leakage from the master cylinder or brake lines will cause the car's brakes to feel soft. If the brake material is too soft, its high-temperature stability will deteriorate, which can also result in soft brakes.