Brake fluid is a hydraulic fluid specifically designed to operate in the high-stress environment of a braking system. Its primary role is to transmit the force applied to the brake pedal by the driver to the brake components at each wheel, bringing your vehicle to a stop.

Brake fluid is a type of hydraulic fluid used in hydraulic brake and hydraulic clutch applications in automobiles, motorcycles, light trucks, and some bicycles. It is used to transfer force into pressure, and to amplify braking force.

Brake fluid is the lifeblood of the brake system and a commonly overlooked, but integral, part of your vehicle. It is a hydraulic fluid responsible for one job: Stopping your vehicle! Brake fluid transfers the action of pushing on the pedal to the brake calipers or drums through a series of brake hoses and lines to actually stop your vehicle.

Let’s take a look at what brake fluid does, the types of brake fluids available, the costs of changing your brake fluid, and when to get it done.

Nov 24, 2015 · Brake fluid is a non-compressible substance that lies within the brake lines, delivering the force created by your push on the brake pedal to each of the brake rotors on the four corners of your vehicle. This applies pressure to the wheels and ultimately slows or stops your movement.

Feb 5, 2024 · Brake fluid is classified by DOT (Department of Transportation) type. The fluid reservoir cap should be stamped with the recommended fluid type. You can also consult your owner's manual or...

Mar 17, 2025 · Brake fluid is predominantly made of glycol-ether, which is a hygroscopic fluid. This means that the fluid absorbs moisture from the air around it. “Water by volume” refers to the amount of water that has been absorbed by the brake fluid. The temperature at which the brake fluid boils when 3.7% water by volume has been absorbed will ...

Jun 2, 2023 · Brake fluid is a type of hydraulic fluid that transfers the force you apply on the brake pedal to the brake system of your vehicle. When you press the brake pedal, this fluid moves through the brake lines, activating the brakes and slowing your car down.

Mar 19, 2021 · Brake fluid is a type of hydraulic fluid that is pressurized in a vehicle’s braking system. The fluid itself can be silicone- or glycol-based in its composition and comes in a few...

Apr 2, 2025 · Brake fluid should be a clear, light yellow color (sometimes light-colored green and pink). If it's dark, murky or has visible dirt, it may be contaminated fluid that could harm your brake system. Because brake fluid absorbs moisture over time, high moisture content can reduce the boiling point, making brakes less effective. You can use test ...