DETROIT – Graco Children’s Products is recalling 1.9 million infant car seats, agreeing to government demands in what is now the largest seat recall in American history.

The recall came after a five-month spat between Graco and the National Highway Traffic Safety Administration. Earlier this year the company recalled 4.2 million toddler seats for a harness buckle problem. But it resisted the agency’s demand to recall the infant seats.

Buckles can get gummed up by food and drinks, making it difficult to remove children. In some cases parents had to cut harnesses to get their kids out. The agency says that increases the risk of injuries in emergencies.

Graco argued that infant seats are used differently, and in an emergency, an adult can remove the whole seat rather than using the buckle.