Does Brake Fluid Need to Be Replaced?
2 Answers
Brake fluid does need to be replaced. When the car brakes, water molecules are generated due to high temperatures. Additionally, brake fluid is a highly concentrated liquid with strong water absorption capabilities, so its moisture content will inevitably increase over time, affecting the vehicle's braking performance. Regular replacement of brake fluid is crucial. As for the replacement interval, it is generally recommended to replace it every 2 years or every 40,000 kilometers driven. A more direct method is to check the moisture content of the brake fluid; if it exceeds 3%, replacement is necessary.
As a veteran driver with over 20 years of experience, I've personally encountered troubles caused by aged brake fluid. Once during a long downhill drive, I suddenly felt the brake pedal go soft with significantly reduced pressure, nearly causing an accident. Later I learned that brake fluid gradually absorbs moisture over time. When it contains too much water, it vaporizes under high temperatures and compromises braking performance. Since then, I've made it a rule to change the fluid every two years or every 50,000 kilometers. Mechanics have warned that neglecting this could corrode brake lines and pumps, leading to costly and troublesome repairs. During routine maintenance, if the fluid appears dark or cloudy, it must be replaced immediately. Never skimp on this safety measure – accidents leave no room for regrets.
