The hydraulic system consists of two separate circuits. The main brake cylinder includes separate reservoirs for two circuits, in the event of a fluid leak or damage in one of the hydraulic actuators, the other remains active. A dual pressure regulator distributes hydraulic pressure between the front and rear brakes to prevent the rear wheels from locking up. The brake fluid level warning is given by a warning light activated by a sensor in the master cylinder reservoir.
Pic. 6.1. Brake circuit of a Mazda 3 car: 1 - cars with left-hand steering; 2 - vehicles with right-hand steering; 3 - brake pedal; 4 - main cylinder; 5 - brake booster; 6 - front brake mechanism (disk); 7 - rear brake mechanism (disk); 8 - without anti-lock braking system; 9 - double pressure limiter