Today, brake fluid can be accurately tested to determine replacement needs. In fact, moisture in brake fluid today isn't much of a service issue because modern construction techniques of flexible brake hoses have eliminated most brake fluid moisture intrusion issues.

Traditionally, brake fluid problems occurred when moisture seeped into the brake fluid, but the service issues with fluid today are different than 20-30 years ago. What are the most common brake fluid problems? Brake fluid is also a lubricant and anti-corrosion fluid that helps to make sure that your vehicles brake system works optimally. Brake fluid is a type of hydraulic fluid that is used in brake systems to aid in the movement of the brake pedal to actuate the brake pads at the wheels-thus stopping your vehicle.