Car brakes on your car use fluid pressure to work. When a car’s brake pedal is pushed, a plunger in the brake’s master cylinder pressurises the brake fluid that resides in the hoses and pipes to make the other components of the braking system move. Most manufacturers suggest that the fluid is replaced at least every couple of years. Although the fluid is in a sealed system, moisture can still find its way in. It corrodes components over time and decreases the temperature at which the fluid is supposed to boil. Furthermore, as the internal components of the braking system wear out, debris contaminates the fluid, jamming everything up. All of this impacts on how well the brakes function, particularly in constant stop-start traffic with heavy braking.