How Many Liters of Brake Fluid Are Needed for a Car Replacement
2 Answers
Brake fluid replacement only requires 1 liter, and in fact, most cars do not even use up the full liter. Below is relevant information about automotive brake fluid: 1. Function: The role of brake fluid is that when the brake pedal is pressed, the liquid pressure increases through the master brake cylinder, causing the pistons on the wheel cylinders of all four wheels to extend under the action of the sealing rubber cups. Utilizing the principle of leverage, this force acts on the brake discs and brake pads to achieve braking. 2. Replacement Cycle: Most people believe that brake fluid replacement is only determined by time and mileage. However, it also depends on the climate and humidity of the vehicle's location. In tropical regions, it should be replaced annually or every 20,000 kilometers; in cold regions, every two years or 40,000 kilometers; and in temperate regions, every three years or 60,000 kilometers.
I've changed the brake fluid several times. Generally, a small family car needs about one liter, while an SUV or larger vehicle may require one and a half to two liters. It's better to have some extra when purchasing. The key is to completely drain the old fluid to avoid residual air bubbles affecting brake response. I recommend checking the owner's manual for the exact amount, as it varies greatly between different models. The replacement frequency is best every two years or every 30,000 to 40,000 kilometers driven, because brake fluid is highly hygroscopic, and over time, its boiling point decreases, which may result in a spongy feel during winter or emergency braking. If you're doing it yourself, prepare brake fluid, a hose, and a container. Start bleeding from the brake pump and proceed wheel by wheel without rushing. After finishing, pump the brake pedal a few times to test the pressure. Safety first—not replacing the fluid may lead to brake failure and cause accidents.
