The National Highway Traffic Safety Administration examined the car belonging to Kylan Langlinais, the police report from the accident, and other evidence. Takata said it had no comment.
A chemical that inflates the air bags can explode with too much force, blowing apart a metal inflator and sending shrapnel into the passenger compartment. Takata bowed to government pressure in May and declared many of the air bags defective, doubling a recall to 33.8 million.
A lawsuit filed by Langlinais' family says a recall notice arrived two days after the crash.