How to Replace Brake Fluid?
2 Answers
Here are the steps to replace brake fluid: Turn off the vehicle, open the engine compartment hood, and use a syringe to extract the fluid from the reservoir until it reaches the bottom; Fill the reservoir with new brake fluid; Use a jack to lift the vehicle, starting with the rear wheels, and remove the tires; Locate the bleeder screw on the brake caliper and remove the rubber dust cap; Loosen the bleeder screw with a wrench, attach a rubber tube to it, and connect the other end to a drain bottle; Inside the vehicle, start pumping the brakes. When the fluid coming out of the rubber tube is the lighter-colored new fluid, the fluid replacement for that wheel is complete. Stop pumping the brakes, reinstall the tire, and repeat this process for the remaining three wheels; After all four wheels have been bled, check the fluid level in the engine compartment reservoir. If it has reached the lower limit, add new brake fluid as needed.
I've changed my brake fluid at home a few times, and it's been quite interesting. Prepare new brake fluid, hoses, containers, and wrenches, ensuring the car is parked on level ground with the handbrake on and the wheels blocked to prevent movement. Open the hood and locate the brake fluid reservoir, first removing some old fluid or directly adding new fluid. It's best to have a friend assist, but if not, proceed slowly on your own. Start with the rear wheel caliper, as it's farthest from the reservoir and prone to air issues. Use a wrench to remove the wheel and locate the bleeder screw, attaching a hose with the other end in a container. Have your friend press and hold the brake pedal for a few seconds to stabilize the pressure, then you open the screw to let the old fluid drain, ensuring the reservoir is continuously topped up with new fluid to avoid running dry. Repeat the process for each wheel until the fluid runs clear and bubble-free. Finally, check that all screws are tightened, cap the reservoir, and test the brake pedal for firmness. Remember to change the brake fluid every two years, as it absorbs moisture, lowering its boiling point and affecting performance, especially in rainy conditions or long drives. With the right tools and careful operation, you can save money and learn a useful skill.