Do you know how your BMW 540i brakes work? A good understanding of the mechanisms involved with your 540i brakes is the first step in preventing brake failure that can end in a serious collision. Most likely, your BMW 540i brakes are a disc braking system, though some older model cars employ a drum brake system. With a disc 540i brake system, there are two different types of components: hydraulic and frictional.

The hydraulic components of your BMW 540i brakes include various brake lines and brake hose, a fluid reservoir, a master cylinder, and brake calipers with pistons and slides. The frictional components involved in the construction of 540i brakes are the brake pads, which float on top of the calipers, and the brake rotors, which are also called brake discs.

Here is how your BMW 540i brakes operate: when you step on your brake pedal, the force is transmitted through the hydraulic brake fluid to the master cylinder. From there it is sent to the brake calipers, causing the pistons to pull in and bringing the brake pads on either side of the brake rotors into contact with the spinning metal disc. Your BMW 540i brakes use the friction created between the brake pads and the rotors to stop the rotational motion of your wheels, and therefore bring your car to a safe and controlled stop. When any part of your 540i brakes is damaged, worn, leaking, or broken, your BMW 540i brakes could fail without warning. Squeaking, squealing, shuddering, grinding, pulling, loss of pressure, and "hard" brake pedals are all signs of a problem with one or more components of your 540i brakes.We carry a complete line of BMW 540i brakes and brake parts in our vast online catalogue.