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Automotive glossary

Brake Line

Brake lines are the metal pipes and flexible hoses that carry brake fluid to each wheel.

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What is Brake Line?

Steel lines run along the underbody; flexible hoses connect to moving parts. Some lines are copper-nickel, which resists rust. Lines are flared to fit fittings. Replacement lines must use the correct flare type and be bent to follow the original route without kinks. After work the system must be bled.

How it works

They carry high hydraulic pressure from the master cylinder to the calipers.

Why it matters for your car

Corroded lines can burst under hard braking. Cracked or bulging hoses must be replaced.

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