At a glance
What can fail
The nut connecting the driveshaft to the wheel hub may not be properly tightened. Over time it could loosen, causing the driveshaft to disconnect and cutting power to the drive wheels.
What the fix does
Dealers will replace the nut with a new one and tighten it correctly to restore proper driveshaft connection.
Summarized — see the official notice for exact wording, dates, and contacts.