Can't the Brake Be Depressed When the Car Battery Is Dead?

[SanKaylee]

When the car battery is dead, the brake cannot be depressed. The reasons why the brake cannot be depressed are as follows: 1. Air in the brake fluid line: Brake fluid is the medium for transmitting force in the braking system. If air enters the fluid line, the brake fluid under high pressure will appear insufficient in strength. Although there is still braking force, the maximum braking force is significantly weakened. In this case, the braking system should be promptly bled at a repair shop. 2. Brake fluid not replaced for a long time: If the brake fluid is not replaced in time, it will contain excessive impurities and moisture, which will affect the transmission of braking force. 3. Oil leakage or overly soft brake material: Generally, oil leakage from the brake master cylinder or brake fluid line will cause the vehicle's brake to become soft. If the brake material is too soft, its high-temperature stability will deteriorate, which will also cause the vehicle's brake to become soft.