How to Determine When to Replace Brake Fluid

1 Answers
OAnthony
07/30/25 4:28am
Determining whether brake fluid needs replacement involves observing the color change of the fluid flowing through the transparent rubber tube from dark to light, until it matches the color of new fluid, indicating the completion of the brake fluid replacement. Since a brake fluid changer is used, there is no risk of air entering the brake system, eliminating the need for observation via a water bottle or bleeding. During the fluid drainage process, the rubber tube connected to the drain port should be placed into a bottle filled with water. As air and oil cannot dissolve in water, observe the color of the discharged fluid and check for any air presence. Brake fluid is the liquid medium in hydraulic braking systems that transmits braking pressure, used in vehicles equipped with hydraulic braking systems. Its characteristics include: 1. Low freezing point: maintains good fluidity under low-temperature conditions; 2. Extremely high boiling point: prevents vapor lock under high-temperature conditions.
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