Should Brake Fluid Be Replaced When Its Water Content Reaches 2.5%?

[VanSabrina]

Under normal circumstances, the water content in brake fluid should be below 1%. If it is too high, it will lower the boiling point of the brake fluid, causing the fluid to boil and vaporize during high-intensity braking, which can lead to brake failure. When the water content in brake fluid reaches 3%, the boiling point of the brake fluid will decrease by 25%. If the water content reaches 7-8%, the boiling point of the brake fluid will drop by more than 50%. Relevant information about brake fluid is as follows: Introduction to Brake Fluid: Brake fluid is also known as hydraulic brake fluid. There is a certain proportion of water content in brake fluid, and when the water content is too high, it must be replaced promptly. Brake fluid inherently has hygroscopic properties, meaning moisture from the air can seep into the brake fluid reservoir through the vent hole over time, leading to excessive water content in the brake fluid. Function of Brake Fluid: It effectively lubricates the moving parts of the braking system, extending the service life of brake calipers and rubber cups.