National average cost of a Brake Fluid Flush for popular vehicles:
Avg. cost $91
Avg. cost $348
Avg. cost $63
What is a brake fluid flush and how is it done?
The brake system on your vehicle is a hydraulic system consisting of a pump (the master cylinder), a network of tubing that runs along the underbody to each wheel (the brake lines), a pair of brake pads or shoes that create friction when forced against a spinning metal object, and the disc (rotor) or drum against which the pads are squeezed or pressed. The hydraulics are engaged whenever you press on the brake pedal and actuate the master cylinder. The master cylinder, in turn, pumps or puts pressure on the hydraulic oil known as brake fluid that is used to slow and stop your vehicle. Over time, the brake fluid in the system degrades and needs to be replaced. The most complete way to replace the fluid is with a fluid flush service.
What are the signs that a vehicle needs a brake fluid flush?
Brake fluid is hygroscopic, meaning it readily absorbs moisture, and should be changed periodically as part of routine vehicle maintenance. Certain driving conditions can cause your brake fluid to need replacement sooner than might be recommended by the manufacturer. Signs that your brake fluid needs to be replaced include
The fluid in the master cylinder reservoir appears dirty or discolored, brown or black rather than nearly clear with a yellow tint, or it contains foreign particles
The fluid level in the master cylinder is low, indicating a possible leak that could introduce moisture into the system and contaminate the brake fluid
Your brake pedal feels soft or spongy and the vehicle is difficult to stop
A warning light on the dashboard comes on, either a brake warning light or Check Engine Light
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There are two methods to replace brake fluid in a vehicle
bleeding and flushing. Bleeding the brakes involves manually pumping fluid through the brake lines using the brake pedal or allowing gravity to pull brake fluid from the lines. A brake fluid flush involves the use of a power flushing machine that thoroughly removes all of the old brake fluid from the system and replaces it with new fluid without introducing any air into the lines. This is especially helpful for the majority of vehicles that feature antilock brake systems. To perform a brake fluid flush, a mechanic will typically do the following
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