(NBC)-- A company called Diono, which used to be called Sunshine Kids Juvenile, is recalling more than half a million child car seats.
The recall covers all-in-one convertible seats and booster seats. Here are the models included in the recall: the Rainer, the Radian rXT, the Radian r120 and the Radian r100, as well as the Olympia and the Pacifica.
According to posted government documents, when the seats are secured using a lap belt without the top tether, children over 65 pounds have an increased risk of injury in a crash.
The problem was discovered during company testing.
Diono will send a kit with an energy absorbing pad and a new chest clip at no cost. Customers can also call Diono at (855) 463-4666 with any questions.