Brake Master Cylinder repair & replacement made easy

The brake master cylinder is used to create pressure in the brake hydraulic system, forcing the brake caliper piston to move out and apply the brakes.

• Mechanic will inspect the brake system.
• Mechanic will check the brake master cylinder to establish if it should be replaced.
• If necessary, the mechanic will replace the brake master cylinder.
• Mechanic will renew the brake fluid.
• Mechanic will bleed the brake system.
• Mechanic will inspect the brake system and will, if deemed safe, do a test drive.

Unless you are a qualified mechanic with the required skills, training and equipment to do the job, we strongly recommend a brake master cylinder repair is only carried out by a professional mechanic. ClickMechanic can help get you a vetted and local mechanic to carry out the work. Just enter your postcode and your car's registration number at the top of this page and select the work needed to get an instant fixed price up front.

• When the brake pedal feels soft under braking and continues to the floor without pressure.

On average, brake master cylinder repair times can range from under 1 hour to 1.5 hours with an average of around 1 hours. The time that the job takes will depend on a number of factors, like your vehicle's make and model, year, as well as other factors. Select your car at the top of this page for information on job time and cost for your vehicle through ClickMechanic.

The master cylinder has internal and external seals which can wear out over time. When the external seals are worn brake fluid can leak out and prevent the brakes from working correctly. Should the internal seal fail, the system will not create sufficient pressure in the hydraulic system, so replacing the master cylinder is imperative and with immediate effect as braking performance will deteriorate and it can potentially lead to dangerous situations on the road. In this instance, it is advisable that you do not drive the car but have the system checked over as soon as possible by a mechanic who can come to you.

Although it's not a common failure point on vehicles, obviously wear and tear will take its toll over time and eventually like everything where rubber acts against a metal surface it will wear out.

If you experience any untoward characteristics in your braking, or if you suspect there is any issue with the brake master cylinder or there are concerns about its age or condition, book a diagnostic inspection immediately and do not drive the vehicle. Driving with a bad brake master cylinder can impair brake performance and safety, and can be lethal.