WASHINGTON (AP) — Hyundai Motor Co. said it is voluntarily recalling 139,500 Sonata sedans in the US because of a manufacturing defect that could cause drivers to lose steering control.

The recall affects 2011 models built between December 11, 2009 and September 10, the National Highway Traffic Safety Administration noted on its website yesterday. Some of the cars have steering column shafts with connections that may not have been tightened enough or were improperly assembled. As a result, the steering wheel could become separated from the column or a driver could lose the ability to properly steer the car.

The US government had opened an investigation into possible steering problems in the vehicle in August. Hyundai, South Korea's top automaker, has said there have been no related injuries or crashes reported.

Owners of affected vehicles can go to their dealers for inspection. Dealers also will update power steering software.

The recall comes as automakers ramp up their focus on safety and quality control in the wake of Toyota Motor Corp.'s massive global recall last year over gas pedal and floor mat problems.