Gather the necessary materials. You will need:
New brake oil of the DOT (Department of Transportation) specification recommended by the manufacturer
A brake fluid bleeder kit, which contains a bleeder screw wrench, tubing, and a container for the old brake oil
A funnel
Wrenches
A turkey baster or syringe
1. Prepare the car. Jack it up and place it on jack stands, or park it on a level surface and set the emergency brake.
2. Locate the brake fluid reservoir. It is usually located under the hood of the car, near the master cylinder.
3. Remove the old brake fluid. Use the turkey baster or syringe to remove as much old brake fluid from the reservoir as possible.
4. Disconnect the brake line from the master cylinder. Use the bleeder screw wrench to loosen the brake line fitting. Place one end of the tubing from the brake bleeder kit onto the fitting and place the other end into a clear container.
5. Open the bleeder screw on the caliper or wheel cylinder. Use the bleeder screw wrench to open the bleeder screw located on the caliper or wheel cylinder. Brake fluid will start flowing from the bleeder screw.
6. Pump the brake pedal. Have a helper slowly pump the brake pedal while you watch the brake fluid in the container. As the brake pedal is pumped, old brake fluid will be forced out of the brake line and new brake fluid will enter the system.
7. Continue bleeding the brakes until new, clean brake fluid is flowing out of the bleeder screw.
This may take several pumps of the brake pedal.
8. Tighten the bleeder screw.
Use the bleeder screw wrench to tighten the bleeder screw.
9. Reconnect the brake line to the master cylinder. Use the bleeder screw wrench to tighten the brake line fitting.
10. Fill the brake fluid reservoir. Use the funnel to add new brake fluid to the reservoir until it reaches the "full" mark.
11. Test the brakes. Pump the brake pedal several times to make sure the brakes are working properly.
It is important to note that changing brake oil can be a messy job, and it is important to take precautions to protect yourself and your vehicle. Always wear safety glasses and gloves when working with brake fluid, and avoid spilling any brake fluid on your car's paint. If you do spill any brake fluid, rinse it off with water immediately.
If you are not comfortable changing brake oil yourself, you can take your car to a qualified mechanic to have the service performed.
