One of the most important component of a car that evolved along with the evolution of cars is the steering. Some of the most important types of steering in the evolution of steering are rack-and-pinion steering, recirculating-ball steering and power steering. The most recent type is power steering, though some of the big trucks, buses and heavy vehicles still have a rack-and-pinion steering or recirculating-ball steering. The most important component of all types of steering are the Rack and the Pinion. Nowadays, Steering come with a steering rack and a steering box. While replacing or servicing the steering parts, it is very important to take care that original and high quality steering parts are used. Otherwise it may lead to disasters. A power steering rack is a very costly and a major component in car steering. Always go for a known and branded retailer to service or replace your steering parts. Many accidents have occurred in recent years due to failure of car parts like steering, brake and others.