Unlike other components, your BMW X3 brake system lets you know right away when something is out of whack. Despite the vehicle's sophistication, BMW X3 brakes operate on very simple principles of physics. Tubes known as brake lines and hoses contain a hydraulic fluid, which flows through the brake system by way of a number of cylinders.

When the brake pedal is depressed, this fluid expands, exerting extreme force on the calipers. The calipers clamp down on the rotor and stop the vehicle, much like a bicycle.

When leaks develop, the brake petal will begin to feel "soft," or "spongy." Sometimes, the problem can be corrected simply by adding hydraulic brake fluid to the BMW X3 master cylinder. If this does not correct the problem, however, the brake system has probably developed a leak. Such leaks may occur in the brake hoses, brake lines, joints between them, or in any of the brake cylinders. Brake lines and/or cylinders may need be replaced. When brakes start squealing or whining, this indicates worn brake pads that should be replaced before the brake rotor is damaged by the action of the caliper on bare metal. Keep your BMW X3 brakes working at their best with our large inventory of genuine BMW X3 parts. Imitation "after market" replacements may save you money right away, but cost more down the road as they wear prematurely. Save more in the long run by ordering genuine factory authorized BMW components from us. When you hear your BMW X3 brakes complain, or the pedal starts to feel "spongy," check out our web site for the best deals on genuine BMW X3 parts.