Toyota Motors announced on June 11 that it was expanding its April 2013 recall of approximately 766,300 vehicles to fix an airbag problem.

"In the event of a crash necessitating deployment of the passenger's frontal airbag, the inflator could rupture, with metal fragments striking and potentially seriously injuring the passenger-seat occupant or other occupants," said NHTSA in its summary the vehicles.

Toyota confirmed that the previous recall was based on incomplete serial numbers provided by the parts supplier.

Toyota is changing the remedy from inspection and replacement of the front passenger airbag inflator "if it is involved" to "replace the inflator with a new one."

Other vehicles involved include the 2003-'04 Toyota Corolla Matrix, 2002-'04 Toyota Sequoia and 2002-'04 Lexus SC 430, according to the automaker.

"The 2013 recall remedy involved inspection of the front passenger airbag, and if equipped with an affected inflator, the inflator would be replaced with a newly manufactured one at no charge to the owner," said Toyota in the latest statement. "Toyota has determined that the involved serial numbers provided by the supplier were incomplete, and did not include all of the potentially involved inflators.

Toyota said there is a chance that the vehicles were assembled with improperly manufactured propellant.

No injuries, crashes, or deaths have been reported, according to Cindy Knight, Toyota spokeswoman, who spoke with Edmunds.

"For vehicles which were inspected and did not receive a replacement inflator, Toyota will re-notify the owners and replace the inflator with a new one."

Owners with more questions can contact Toyota at 1-800-331-4331 or Lexus at 1-800-255-3987.

See Now: OnePlus 6: How Different Will It Be From OnePlus 5?