How Much Brake Fluid Do I Need For A Change?

How Much Brake Fluid Do I Need? Mechanic Assistant


Brake fluid is an essential component of your vehicle’s braking system. It is responsible for transmitting the force from the brake pedal to the brake calipers or drums. Over time, brake fluid can become contaminated or worn out, and you may need to replace it. In this article, we’ll discuss how much brake fluid you need for a change.

Why Do You Need to Change Brake Fluid?

Brake fluid is hygroscopic, meaning it absorbs moisture from the air. Over time, this moisture can cause the brake fluid to become contaminated, reducing its effectiveness. Brake fluid can also break down due to heat and pressure, reducing its boiling point and making it less effective at stopping your vehicle.

How Often Should You Change Brake Fluid?

Most manufacturers recommend changing brake fluid every two years or 24,000 miles, whichever comes first. However, if you frequently drive in stop-and-go traffic or in hilly areas, you may need to change your brake fluid more often.

How Much Brake Fluid Do You Need?

The amount of brake fluid you need will depend on the type of vehicle you have and the size of your brake system. Most passenger cars require about one quart of brake fluid for a complete change. Larger vehicles, such as trucks and SUVs, may require more.

How to Check Your Brake Fluid Level

Before you start changing your brake fluid, you need to check the fluid level in your brake master cylinder. The master cylinder is typically located on the driver’s side of the engine compartment. Open the cap and check the level. If it’s low, you may have a leak in your brake system, and you should have it inspected by a professional.

How to Change Your Brake Fluid

To change your brake fluid, you’ll need a few tools, including a brake bleeder kit, a wrench, and a container to catch the old fluid. Start by removing the old brake fluid from the master cylinder using a syringe or turkey baster. Then, attach the brake bleeder kit to the brake caliper or wheel cylinder and open the bleeder valve. Pump the brake pedal until the old fluid is pushed out and replaced with fresh fluid.

How to Bleed Your Brakes

After you’ve changed your brake fluid, you’ll need to bleed your brakes. This removes any air bubbles from the brake lines, ensuring that your brakes work properly. To bleed your brakes, start with the wheel farthest from the master cylinder and work your way closer. Pump the brake pedal several times and then open the bleeder valve until fluid and air bubbles come out. Repeat this process until clean fluid comes out of the valve.


Changing your brake fluid is an important part of maintaining your vehicle’s braking system. By following these steps, you can ensure that your brakes work properly and keep you safe on the road. Remember to check your owner’s manual for specific instructions for your vehicle, and if you’re not comfortable working on your brakes, have them serviced by a professional mechanic.