This recall concerns the spring type parking brake system. (1) The watertight caps may allow water to enter the spring chambers due to an improper installation, and as a result of this, the springs may rust and eventually break. If this occurs, the diaphragms may break and allow air to escape, and in the worst case, the parking brake would be actuated while the vehicle is in motion. (2) The watertight caps may allow water to enter the spring chambers, because the cap screws do not have an appropriate shape, and as a result of this, the springs may rust and eventually break. If this occurs, the diaphragms may break and allow air to escape, and in the worst case, the parking brake would be actuated while the vehicle is in motion. (3) The watertight caps may allow water to enter the spring chambers, because the cap screws were not properly driven at factory, and as a result of this, the springs may rust and eventually break. If this occurs, the diaphragms may break and allow air to escape, and in the worst case, the parking brake would be actuated while the vehicle is in motion.