What is the power brake booster connected to?

The power brake booster is connected to the vehicle's brake system and is typically linked to the master cylinder. It utilizes vacuum pressure from the engine or a hydraulic source to amplify the force applied to the brake pedal, making it easier for the driver to engage the brakes. In vehicles with hydraulic systems, it may also be connected to the hydraulic brake lines. This system enhances braking efficiency and responsiveness, ensuring safer vehicle operation.