Steering Column

It is collapsible for crash safety. It holds switches and the ignition lock. Height and reach are often adjustable. Collapsible sections and breakaway mounts help reduce injury in a frontal crash. Many columns include an electric power steering motor, an ignition lock or steering lock, and the clock spring for the airbag. Clunks felt through the wheel can come from the intermediate shaft joint, which is a common wear item.

Shafts and joints transfer steering movement.

Worn joints cause play or knocking. Electric columns can have motor faults.