Steering Column
The shaft and housing assembly that connects the steering wheel to the steering gear or rack and pinion, transferring rotational force to turn the vehicle.
The steering column is the primary physical link between the driver and the vehicle's steering gear. It houses the steering shaft, which transmits the rotational movement of the steering wheel down to the steering gear or rack-and-pinion unit. Beyond this core mechanical function, the steering column serves as the mounting structure for numerous safety and convenience features.
Modern steering columns are designed with safety in mind and feature a collapsible design. In the event of a severe front-end collision, the column collapses telescopically rather than being driven backward into the driver's chest. The column also houses the steering lock mechanism, ignition switch, turn signal switch, wiper controls, and the clockspring, which maintains electrical connection to the driver's airbag and steering wheel controls.
While steering columns are highly durable, internal components can wear out or fail. Common issues include worn u-joints in the intermediate steering shaft (causing a clunking noise or binding when turning), a failing ignition switch, or a faulty steering lock. A binding steering column is extremely dangerous and must be diagnosed immediately.
Servicing a steering column or replacing intermediate steering shafts requires specialized tools and knowledge of airbag safety systems to prevent accidental deployment or damage to the clockspring.