How Often Should Brake Fluid Be Changed?
2 Answers
Brake fluid should be changed every two years or 40,000 kilometers, with the specific interval determined by the cycle specified in the user manual. Criteria for determining whether brake fluid needs replacement: Whether brake fluid needs to be replaced mainly depends on its water content. Professional equipment is required to measure the moisture content in the brake fluid. When the measured result exceeds 3%, the brake fluid should be replaced. If it exceeds 5%, immediate replacement is necessary, as the boiling point would already be too low, directly affecting the vehicle's braking performance. It is recommended that car owners regularly use a brake fluid tester to measure the moisture content and decide whether replacement is needed. Brake fluid has hygroscopic properties, and if left unchanged for too long, the safety factor of driving will decrease. If you notice that the brake pedal feels significantly softer or the car struggles to stop, it's time to check whether the brake fluid has oxidized or deteriorated. If so, it should be replaced promptly to avoid potential hazards. Brake fluid, also known as brake liquid or hydraulic fluid, is made from refined diesel fractions with thickeners and antioxidants. When replacing brake fluid, ensure to use the original manufacturer's brake fluid to guarantee its quality.
I've been driving for twenty years, and brake fluid replacement is often overlooked but crucial. It's generally recommended to change it every two years or 30,000 kilometers, but always refer to your owner's manual. Brake fluid absorbs moisture, which lowers its boiling point. In humid weather or during long downhill drives, you might notice a softer brake pedal and slower response. Once after rain, my brakes failed, but replacing the fluid fixed it. Regularly test moisture content at maintenance shops using a test pen. Making this a habit prevents accidents, costs little, and extends brake system life. Maintaining brake health is key to safe driving—don't wait for problems to arise. Combining it with oil changes makes it convenient and efficient.
