Operator placed on leave after it was found she did not relay information to police while teenager was slowly dying.
Honda has won awards for three years straight.
Honda said that the rupture occured in the passenger-side air bag.
Led by Honda and Fiat Chrysler, eight automakers expand the largest-ever auto safety push.
The National Highway Traffic Safety Administration cited ammonium nitrate as a factor that caused seven deaths.
Recalls have already been issued for 17 million vehicles at the regional level.