A brake booster, also known as a brake servo, is a device that multiplies the force applied to the brake pedal by the driver. This makes it easier to stop the vehicle, especially at low speeds or when the vehicle is heavily loaded. Brake boosters are typically powered by vacuum from the engine’s intake manifold, but some vehicles use hydraulic or electric boosters.
Brake boosters are an important safety feature, and they can help to prevent accidents. If your brake booster fails, you will need to apply much more force to the brake pedal to stop the vehicle. This can be difficult, especially in an emergency situation.