What are Brake Hoses and Brake Lines?
The flexible hoses and steel pipes that carry brake fluid to each wheel.
Simplified animation — not to scale.
In plain English
Brake lines are the rigid steel pipes that run under the car. Brake hoses are the flexible rubber sections at each wheel that let the hose move with the steering and suspension. Together they carry brake fluid from the master cylinder to every caliper.
"Like a garden hose with a kink — water still gets through, but slowly, and it doesn't stop when you let go of the tap."
How it works
Rigid steel pipes survive vibration but can't flex, so a short rubber hose bridges the gap to each wheel. The hose has internal reinforcement to stop it ballooning under pressure. Steel lines can rust through from the outside; rubber hoses can crack, swell internally and act like a one-way valve.
Signs of trouble
- ⚠Spongy pedal that worsens over months
- ⚠Visible fluid leaks under the car or behind a wheel
- ⚠A single wheel that drags after braking (swollen hose)
- ⚠Brake pulling to one side
- ⚠MOT advisory for corroded brake pipes or perished hoses
£100 – £350 per axle fitted
Always get a written quote. Prices vary by car, region, and parts brand.