What are the causes of brake fluid leakage?

2 Answers
StAnastasia
07/29/25 1:54pm
The causes of brake fluid leakage include the following: 1. Brake hose rupture: The brake hose connects the brake pump to the brake caliper. When the brake pedal is pressed, brake fluid is transmitted through the hose to the caliper piston, which then pushes the brake pads against the brake disc to generate braking force. If the brake hose ruptures, leakage will inevitably occur. 2. Damaged sealing rings: Brake fluid is highly corrosive. Although sealing rings are resistant, they will degrade over time, reducing their sealing effectiveness and leading to leakage. 3. Loose or damaged hose screws: If the hose screws are damaged, leakage may occur. Simply replace the screw if it is damaged, or tighten it if it is loose.
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DeCole
08/13/25 5:25am
I've been driving for over ten years, and brake fluid leaks are really a headache. The most common cause of leakage is the aging of the brake system's pipelines, especially metal pipes that are prone to rust and corrosion in humid environments, leading to small holes where the fluid seeps out. Rubber hoses can harden and crack over time, particularly in the high temperatures of summer or the extreme cold of winter, making them more likely to burst and leak. If the sealing gasket of the master cylinder wears out and fails, the fluid will leak out, and the piston seal ring of the wheel cylinder may also thin out, causing leakage. If the fluid reservoir is cracked or the cap isn't tightened properly, the fluid can spill out. I once experienced this—after parking, I noticed oil stains on the inside of the wheel and found out the pipe joint was loose. If these small issues aren't fixed in time and the fluid leaks out completely, the brakes can fail, which is a serious safety hazard. It's recommended to have a mechanic check the pipelines and fluid level every six months. Prevention can save a lot of trouble. A car is like an old companion—only when well taken care of can it safely hit the road.
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