Defect
On certain vehicles, the bolt that attaches the steering shaft to the steering gear may not be properly tightened. Over time, the bolt may loosen. If you continue to operate the vehicle, the bolt could detach completely and cause a loss of steering control.
Safety Risk
A loss of steering could create the risk of a crash.
Remedy
Audi will notify owners by mail and instruct you to take your vehicle to a dealer to inspect the steering shaft bolt and, if necessary, replace it.