A steering rack boot is an essential component of the steering system in a vehicle. It is a protective cover that sits over the steering rack, sealing the area where the steering column enters the steering rack. The primary function of the steering rack boot is to keep the steering rack protected from dirt, debris, and other elements that can cause damage or corrosion.

The steering rack boot works by preventing external elements from entering the steering rack mechanism and causing premature wear and damage to its inner components. Dirt and debris can cause corrosion to the rack shaft and corroded shafts can damage the internal seals and bearings, resulting in a costly repair. Therefore, keeping the steering rack protected ensures the smooth operation of the steering system and also helps to extend the lifespan of the steering rack. The steering rack boot also helps to prevent steering oil from leaking out of the rack and prevents water from entering the steering system. Therefore, it is essential to maintain the steering rack boot in good condition to ensure the proper functioning of the vehicle's steering mechanism.