How to Flush Break Fluid

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To flush brake fluid, follow these steps: Start by locating the brake fluid reservoir, then remove the old fluid. Use a vacuum pump or a brake bleeding kit to extract the fluid from the brake lines, making sure to start with the wheel furthest from the master cylinder and working your way closer.

Once the old fluid is drained, fill the reservoir with new brake fluid and bleed the brakes until clean fluid flows through each wheel.

How to Flush Break Fluid


Safety Precautions

To safely flush brake fluid, start by parking on a level surface. Locate the brake fluid reservoir and empty it gradually. Refill with fresh brake fluid and pump the brakes to remove any air bubbles. Check for leaks and ensure the fluid is at the correct level.

Protective Gear

When flushing brake fluid, safety should be the top priority. Make sure to wear the appropriate protective gear, including:

  • Safety goggles: Protect your eyes from any splashing brake fluid or debris.
  • Gloves: Use nitrile or latex gloves to shield your skin from direct contact with the brake fluid.
  • Long-sleeved clothing: Prevent skin exposure by wearing long sleeves.
  • Respirator: To avoid inhaling harmful fumes, use a respirator if working in a poorly ventilated area.

Work Area Preparation

Prior to beginning the brake fluid flushing process, it’s crucial to prepare the work area to ensure optimal safety. Take the following measures:

  • Well-ventilated space: Perform the task in a well-ventilated area to minimize exposure to brake fluid vapors.
  • Stable ground: Work on a level, stable surface to prevent accidental spills or slips.
  • Fire extinguisher: Have a fire extinguisher nearby to address any potential fire hazards.
  • Keep children and pets away: Maintain a safe environment by keeping children and pets at a considerable distance from the work area.


Materials And Tools

Before you begin flushing your brake fluid, it’s important to make sure you have all the necessary materials and tools at your disposal. Having everything prepared will help you complete the task smoothly and efficiently. Here is a list of the items you will need:

Brake Fluid

First and foremost, you’ll need brake fluid, which is vital for your vehicle’s braking system. Make sure to use the recommended type of brake fluid specified in your vehicle’s owner manual. Choosing the right brake fluid is crucial for proper functioning and safety.


A wrench is essential for opening and closing the brake bleeder valve during the flushing process. You’ll need this tool to remove and tighten the valve securely. Ensure you have the correct size wrench that fits the bleeder valve on your specific vehicle.

Turkey Baster

A turkey baster may seem like an unconventional tool, but it is extremely useful when it comes to brake fluid flushing. It’s used to remove the old brake fluid from the master cylinder reservoir. The narrow tube-like shape of the baster makes it easier to suck out the fluid without spilling or contaminating the surrounding parts.

Clear Tubing

Clear tubing is crucial for creating a connection between the brake bleeder valve and a catch container. It allows the old brake fluid to be expelled from the system into the container. The transparency of the tubing allows you to observe the fluid flow and ensure there are no air bubbles present during the bleeding process.

Catch Container

A catch container, also known as a drain pan, is used to collect the old brake fluid that is being flushed out of the system. It is essential to have a container that is capable of holding an adequate amount of fluid and has a secure seal to prevent any spills or leaks.

Rubber Gloves And Safety Glasses

It’s important to wear rubber gloves and safety glasses to protect yourself from any potential contact with the brake fluid. Brake fluid is corrosive and can cause skin irritation or eye damage. Safety should always be a top priority when working with any automotive fluids.

Make sure you gather all these materials and tools before you start flushing your brake fluid. Being prepared will save you time and allow the task to be completed more efficiently.

Step-by-step Process

Flushing the brake fluid in your vehicle is an essential maintenance task that ensures the brake system operates smoothly and effectively. Regularly replacing the brake fluid helps prevent brake failures and maintains the integrity of your brakes. Follow this step-by-step process to flush the brake fluid and keep your vehicle’s braking system in top shape.

Locate Brake Fluid Reservoir

Begin by locating the brake fluid reservoir, which is usually located near the firewall on the driver’s side of the engine bay. The reservoir is a small plastic or metal container that holds the brake fluid. It is usually labeled with either “brake fluid” or a brake symbol. Once you have located the reservoir, open the cap and inspect the fluid level. Ensure it is within the recommended range, topping it off if necessary.

Flush Brake System

1. Prepare the tools and materials: Before starting the flushing process, gather all the necessary tools and materials to avoid interruptions. You will need a syringe or a brake bleeder kit, a drain pan, a wrench or socket set, a turkey baster or clean rag, and fresh brake fluid.

2. Start at the furthest wheel: To properly flush the brake system, begin with the wheel furthest from the brake fluid reservoir, which is typically the right rear wheel. Starting at the farthest point ensures that air bubbles are purged from the entire system.

3. Remove old brake fluid: Using the syringe or brake bleeder kit, remove the old brake fluid from the bleeder valve. Place the drain pan to catch the dirty fluid. Continue extracting the fluid until it runs clear and free of any contaminants.

4. Replenish with fresh brake fluid: Once the old fluid has been properly drained, refill the reservoir with fresh brake fluid, ensuring the fluid reaches the recommended level. This helps prevent air from entering the system during the flushing process.

5. Bleed the brake system: With the help of a friend, pump the brake pedal several times and then hold it down. While the pedal is depressed, open the bleeder valve on the wheel you are working on. This releases any trapped air or residual old fluid. Keep repeating this process until all the old fluid has been replaced with fresh fluid, making sure to check the reservoir periodically and topping it off.

6. Repeat for other wheels: After completing the flushing process for the right rear wheel, move on to the left rear, then right front, and finally the left front wheel. Follow the same steps for each wheel, bleeding out all the old fluid until the fresh fluid appears.

7. Clean up: Once you have flushed all four wheels, clean up any spilled brake fluid and securely tighten the bleeder valves. Dispose of the old brake fluid properly and wipe down the brake fluid reservoir before closing the cap.

By following this step-by-step process, you can effectively flush the brake fluid in your vehicle’s braking system, ensuring optimal performance and safety on the road.

How to Flush Break Fluid


Testing And Final Checks

After flushing the brake fluid, it is crucial to perform testing and final checks to ensure the brake system’s safety and functionality. The testing and final checks are essential steps to guarantee that the brake fluid has been properly flushed and the system is in perfect working condition.

Test Brake Pedal

Start by testing the brake pedal to ensure it feels firm and does not sink to the floor. With the engine off, pump the brake pedal multiple times to build up pressure in the system. The pedal should maintain its position without sinking when pressure is applied.

Check For Leaks

Visually inspect the brake system for any signs of leakage. Look for wet spots or dripping fluid around the brake lines, fittings, and calipers. Any signs of leaks indicate a potential issue that needs to be promptly addressed to avoid compromising the braking performance.

Frequently Asked Questions On How To Flush Break Fluid

Can I Do A Brake Fluid Flush Myself?

Yes, you can do a brake fluid flush yourself by following the proper steps carefully. It’s important to use the right tools and technique to avoid any issues.

Is Brake Fluid Flush Really Necessary?

Yes, brake fluid flush is necessary every 2 years or 40,000-60,000 miles to ensure safe and effective brake performance. Old fluid can lead to corrosion and reduced braking efficiency. Regular flushes help prevent costly repairs and maintain optimal driving safety.

How Much Does A Brake Fluid Flush Cost?

A brake fluid flush typically costs around $70 to $150, depending on the vehicle and location.

Can I Just Add Brake Fluid Without Flushing?

No, it is not recommended to just add brake fluid without flushing. Flushing helps remove old or contaminated fluid, ensuring proper functioning of your brakes and preventing potential issues. It’s important to follow the manufacturer’s recommendations for brake fluid replacement.


Regular brake fluid flushes are crucial for maintaining your vehicle’s braking system. By following the proper steps and using the right tools, you can easily perform this task and ensure the safety of your vehicle and passengers. Remember to consult your owner’s manual for guidelines specific to your car.

Keep your brakes in top condition for smooth and safe driving.

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