Graco is recalling almost 3.8 million car safety seats because children can get trapped by buckles that may not unlatch.
Federal officials want the company to recall another 1.8 million rear facing seats but so far the company has resisted.
The recall covers 11 models sold from 2009 through 2013,
The National Highway Transportation Safety Administration warned that the problem could make it difficult to remove the child from the seat after crash.
The company will send replacement buckles for free to owners who registered their seats. Owners who didn’t can call the company’s consumer hotline at 800-345-4109 or visit its website.