How Many Liters of Brake Fluid Should Be Replaced at One Time?
2 Answers
Generally, only 1 to 2 liters of brake fluid need to be replaced. The performance and replacement cycle of brake fluid are as follows: Brake Fluid Performance: Brake fluid, also known as brake liquid or mineral oil brake fluid, has properties such as oxidation stability, anti-foaming, anti-rubber swelling, and anti-rust. Brake Fluid Replacement Cycle: The replacement cycle is related to the braking process during driving and the vehicle's braking system. Brake fluid has water-absorbing characteristics, and if it is not replaced for a long time, the safety factor of driving will decrease. If the vehicle is used frequently, the brake fluid can be replaced at around 30,000 kilometers; if the usage frequency is lower, the replacement cycle can be extended accordingly, usually around 50,000 to 60,000 kilometers.
I'm a car enthusiast, and the amount of brake fluid needed for a change depends on the vehicle model. Generally, a small car requires about 0.8 to 1.2 liters per change. For example, my old sedan only needed 1 liter because that's the system's capacity. But why change it? Brake fluid absorbs moisture over time, degrading performance and affecting braking response. In an emergency, delayed reaction can be dangerous. I recommend checking the owner's manual before changing, as requirements vary by vehicle—SUVs might need more. Don't skimp on this; inspect and replace every two years or 40,000 kilometers, using the correct DOT4 specification to avoid system damage. It's best to have a professional shop handle the job, as DIY attempts can introduce air, leading to spongy brakes. Spending a little for safety is crucial—you never know what might happen on the road.
