How often is the best time to change the brake fluid?Car brake fluid replacement time and mileage

carBrake FluidThe replacement time is usually the best when it is replaced every 2 years, and there is no strict requirement for the number of kilometers driven.If you really want to drivemileageTo know more accurately whether to replace the brake fluid, the best way is to detect the water content of the brake fluid. If the water content of the brake fluid exceeds 3%, it is generally recommended to replace the brake fluid; if the water content of the brake fluid exceeds 5%, it must be replaced to prevent problems.

Under normal circumstances, the water content in automobile brake fluid is less than 1%.If the water content in the car brake fluid is higher than 1%, it will reduce the boiling point of the brake fluid, leading toTo inIn the case of relatively strong braking, it is very likely that the brakes will fail. When the water content in the car brake fluid reaches 3%, the boiling point of the brake fluid will be reduced by a quarter; when the water content in the car brake fluid reaches 7%-8%, the boiling point of the brake fluid will be reduced by more than half . That is to say, the dry boiling point of a certain car brake fluid is 210°C. When the water content in the car brake fluid reaches 7%-8%, the boiling point of the brake fluid will decrease to about 100°C.

A new car, used for about 12 months, the water content of its brake fluid may be 2%; used for about 18 months, its brake fluid water content may be 3%; a vehicle that has been used for about 5 years, it The water content of the brake fluid may reach about 8%. This would have seriously exceeded the 3% limit. This is why many car manufacturers stipulate in their car usage guidelines that the brake fluid should be replaced every 2 years.