What is the replacement interval for brake fluid?
2 Answers
Generally, brake fluid should be replaced every 20,000 kilometers or every two years. Brake fluid, also known as hydraulic brake fluid, is the liquid used in hydraulic brake systems to transmit pressure. There is no specific replacement interval for brake fluid, but during regular vehicle use, it is important to check if the brake fluid level is low. Under normal driving conditions, if the braking distance increases and it is not caused by other brake issues, the brake fluid should be replaced. Below are some relevant points about selecting brake fluid: 1. When choosing brake fluid, opt for a higher-grade product. The higher the grade of the brake fluid, the smoother the braking performance will be. 2. Since the brake system operates in a sealed environment with certain pressure, only brake fluid with good flow properties can meet the requirements. During operation, the brake fluid is transmitted to other components of the braking system.
The brake fluid replacement interval is generally around two years or 30,000 kilometers, but you should refer to your vehicle's manual for specific requirements. I drive an ordinary sedan and always ask the mechanic to check it during routine maintenance. Since brake fluid is highly hygroscopic, its boiling point decreases over time, which may result in a spongy brake pedal during emergency stops - quite dangerous. I once experienced this on the highway when delayed replacement made the brakes feel alarmingly weak. It's recommended to regularly test moisture content with a tester; replacement is needed if it exceeds 3%. Though inexpensive (just tens of RMB per bottle), this maintenance is crucial for safety. Make it a habit to consult technicians during annual servicing to ensure braking system reliability.
