At a glance
What can fail
Moisture exposure can damage the driver-front airbag inflator, causing it to inflate improperly, deploy with excessive force, or rupture. A ruptured inflator may scatter metal fragments toward occupants or damage the airbag.
What the fix does
Toyota will mail you instructions to have a dealer inspect and replace the driver-front airbag inflator if needed.
Summarized — see the official notice for exact wording, dates, and contacts.