How To Get Brake Fluid Out Of Master Cylinder

How Long Does a Brake Master Cylinder Last? YourMechanic Advice


If you are a car owner, you know that brake fluid is a crucial component of your car’s braking system. The master cylinder is responsible for maintaining the pressure in the brake lines, and it is where brake fluid is stored. However, sometimes you may need to replace the brake fluid in your car’s master cylinder, and this can be a challenging task. In this article, we will guide you on how to get brake fluid out of the master cylinder.

Tools You Will Need

Before you start, make sure you have the following tools: a turkey baster or a syringe, a clean cloth, a container to collect the old brake fluid, and a fresh bottle of brake fluid.

Step-by-Step Guide

Step 1: Locate the Master Cylinder

The master cylinder is usually located near the firewall on the driver’s side of the car. It is a small reservoir with a cap on top. Remove the cap and set it aside.

Step 2: Remove the Old Brake Fluid

Using a turkey baster or a syringe, remove the old brake fluid from the master cylinder. Be careful not to spill the old brake fluid on your car’s paint as it can damage the paint.

Step 3: Clean the Master Cylinder

Once you have removed the old brake fluid, use a clean cloth to wipe the inside of the master cylinder. Make sure there is no debris or dirt left behind.

Step 4: Refill the Master Cylinder

Open a fresh bottle of brake fluid and pour it into the master cylinder. Make sure you fill it up to the recommended level, which is usually marked on the reservoir.

Step 5: Bleed the Brakes

After you have refilled the master cylinder, you will need to bleed the brakes. This will remove any air that may have entered the brake lines. Follow the instructions in your car’s owner manual to bleed the brakes properly.


When working with brake fluid, make sure you wear gloves to protect your skin. Brake fluid is corrosive and can cause skin irritation. Also, make sure you dispose of the old brake fluid properly. Do not pour it down the drain as it can harm the environment.


Getting brake fluid out of the master cylinder may seem like a daunting task, but it is an essential part of maintaining your car’s braking system. By following these simple steps, you can replace the old brake fluid with fresh brake fluid and keep your car’s braking system functioning correctly. Remember to always take precautions when working with brake fluid and dispose of the old brake fluid properly.