Brake lines are essential components of a vehicle's braking system. They are tubes that carry brake fluid from the master cylinder to the brake calipers or wheel cylinders. When the driver presses the brake pedal, the master cylinder generates pressure, which travels through the brake lines to activate the brakes. These lines are typically made of metal or reinforced rubber to withstand high pressure and resist corrosion. Proper maintenance of brake lines is crucial, as leaks or damage can lead to brake failure, compromising vehicle safety. Regular inspections can help ensure that the braking system functions effectively.