At a glance
What can fail
The steering wheel spiral cable assembly may disconnect, causing the airbag warning light to come on and the driver-front airbag to stop working. The horn and steering wheel controls may also malfunction.
What the fix does
Toyota will mail you instructions to visit a dealership. The dealer will check your spiral cable assembly's production date and replace it if needed.
Summarized — see the official notice for exact wording, dates, and contacts.