Toyota has recalled the passenger-side inflators in 1.7 million vehicles across North America.
The airbags currently in the vehicles have metal inflators that contain ammonium nitrate without a drying agent added to protect the chemical from moisture. The moisture can destabilize the ammonium nitrate and turn the metal inflator into a grenade full of shrapnel.
The affected vehicles include the 2010-2016 4Runner, 2010-2013 Corolla, 2010-2013 Matrix, and 2011-2014 Sienna. Toyota plans on sending out recall notices towards the end of January.