Brake lines are the tubes that carry brake fluid from the master cylinder to your brake calipers. The pressure of the fluid forces the calipers to squeeze the brake pads against the rotors, which slows your car down. If a brake line is punctured, the fluid leaks out and the brakes can no longer do their job.
the question is how much does it cost to fix brake line? The answer is that it depends on the type of brake line you have, and whether or not you have a dual master cylinder or a single master cylinder. Depending on the make and model of your car, a brake line can range in price from $10 to $100.