LOUISVILLE, Ky. (WDRB) -- More than 400,000 car seats have been added to Graco's recall -- but that isn't enough for the National Highway Traffic Safety Administration, who says Graco needs to add nearly 2 million to the list.

The issue: faulty harness buckles. Buckles can get jammed with food and drinks, making it hard to get children in and out of the seats.

It also increases risk for injuries.

Nearly 4 million seats have been recalled so far.

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