Dual-circuit Brakes (Split Brake System)
Dual-circuit brakes split the hydraulic system into two separate circuits so that a single leak does not cause total brake failure.
What is Dual-circuit Brakes (Split Brake System)?
Many cars use a diagonal split, with one front and the opposite rear wheel on each circuit. Others split front and rear. Dual circuits are a legal requirement for cars. Regular checks of brake lines and hoses help prevent leaks.
How it works
The master cylinder has two pistons and chambers, each feeding one circuit.
Why it matters for your car
If one circuit fails, the pedal travels further and stopping distance increases sharply. A brake warning light or falling fluid level needs immediate repair.