You should change your Brake fluid every 24 months or 24,000 miles (whichever comes first). Any longer and the water content in the fluid will become too high. If you’re thinking of doing it yourself, here are some tips:
- First you’ll need to flush the system. Use a container to drain off the fluid. You’ll also need a spanner plus a can of brake cleaner (spray is best).
- Before you open the main cylinder, clean it using the Brake Cleaner Spray.
- Open the main cylinder and extract the old fluid. You can do this either by vacuum or pressure bleeding.
- Once empty, fill the cylinder with the new fluid. Ensure the brake fluid you are using is correct. Brake fluid is classified via its boiling point. The majority of vehicles use DOT 4 or DOT 5.1 brake but check via the manufacturer before applying.
- Raise the car slightly using a jack so each brake can be accessed individually. You’ll need someone to help by pressing the brake down slightly. When the pedal is pushed, open the brake bleeder valve for each wheel one by one and drain the old fluid into a container. Once the pedal has been pushed right down, close the valve to stop any external moisture getting in.
- Repeat this with each wheel until the fluid being drained is runs clear. It may be necessary to refill the master cylinder a few times in between.
- After this has been done for each wheel, pump the brake pedal 20 or 30 times to increase the fluid level in the master cylinder.
- Should the brake warning light come on after you have completed the process, press to pedal all the way down and the light should go out.
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