Air in the brake system can make your brake pedal feel spongy and vague. You should flush the fluid every two or three years, ...

The brake master cylinder is the first component in a vehicle’s braking system, activated by depressing the brake pedal. The pedal pushes a piston through this cylinder, forcing brake fluid ...

Applying the parking brake mechanically locks the rear brake assemblies to keep ... the force applied on the brake fluid in the master cylinder. The master cylinder also increases brake fluid ...