Hyundai has recalled nearly 240,000 Sonata and Azera sedans in cold-weather US states because road salt can corrode the rear suspension, which is part of the vehicle’s frame.

In advanced cases, the crossmember could detach from the control arms that lead to the wheels, which could affect wheel alignment and increase the risk of a crash.

The recall involves 215,000 Sonata midsize sedans from the 2006 to 2010 model years and 24,000 Azera full-size sedans from 2006 to 2011. It affects vehicles registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin, Delaware and Washington, D.C.

Dealers will inspect the cars and repair or replace the defective parts. Hyundai is not aware of any accidents or injuries associated with the recall, Jim Trainor, a spokesman, wrote in an e-mail to the New York Times.