Brake fluid is a crucial element needed to make your brakes operate successfully. When pressure is generated in the brake fluid lines, energy is distributed to your brake parts so they can perform their main job - stopping your car. If you have a brake fluid leak, your car could take longer to stop or, worse, won't stop at all. If your vehicle has no brake fluid, you're brakes won't even operate. And that's a scary situation we'd never wish on anybody.