BMW 3-Series Power Brake Boosters

The brake booster is a device that multiplies the force applied on the brake pedal. This way, it boosts braking power and reduces driver's effort. Hydraulic boosters and vacuum operated boosters are available; the former use hydraulic pressure generated by the steering pump, the latter employ the vacuum produced by the engine. Vacuum boosters are more common; they are suitable for almost every kind of vehicles. The proper operation of the brake booster ensures smooth, effective, and balanced braking. The importance of the brake booster is obvious. BMW even recalled 76,000 vehicles including the 3-Series several years ago, for potential issues affecting the braking booster.

A typical vacuum operated brake booster is located between the brake pedal and master cylinder and connected to both of them. It consists of a metal vacuum container with a valve and diaphragm: when the brake pedal is pressed, the combination of atmospheric air and vacuum created by the engine amplifies driver's effort on the pedal. Hydraulic brake boosters, on the other hand, feature an accumulator to store pressure produced by the steering pump. Visit our online store for an exhaustive assortment of BMW 3-Series brake boosters carefully designed by trustworthy companies and built to last for years to come.