Why Does Brake Fluid Leak?

1 Answers
LaEvan
07/29/25 9:12am
Brake fluid may leak due to: 1. Brake hose rupture; 2. Damaged sealing ring; 3. Loose or damaged hose screws. Solutions include: 1. Replacing the sealing ring with a new one; 2. Tightening loose hose screws. Brake fluid not only transmits energy but also provides anti-corrosion, anti-rust, and lubrication functions, making it an essential part of the braking system. Automotive brake fluid is the liquid used in hydraulic braking systems. It must be chemically inert, resistant to high temperatures, and not cause corrosion, softening, or swelling to metals and rubber. Common types include DOT3, DOT4, and DOT5. The volume of brake fluid changes with temperature, so the brake fluid reservoir is equipped with a vent hole. Air drawn in through this hole may contain moisture or impurities, which can be absorbed or dissolved by the brake fluid, thereby lowering the boiling point of the moisture-contaminated brake fluid.
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