When you drive your vehicle in areas where enhanced braking is necessary, heat is transferred to the caliper, raising the temperature of the brake fluid. The boiling point of brake fluid will drastically fall if it has moisture. The lower boiling point and increased temperature make it simpler for the brake fluid to boil. Bubbles will appear in the brake system when the brake fluid boils. The brake pedal will hit the floor abruptly without the vehicle slowing down as a result of the air bubbles compressing while braking.