At a glance
What can fail
The rear side door latch may fail to latch or unlatch properly due to corrosion from road salt and water spray. An unlatched door could open while the vehicle is moving.
What the fix does
A seal will be installed on the rocker panel to block corrosive material. The door latch will be inspected, cleaned, and lubricated, or replaced if it doesn't work.
Summarized — see the official notice for exact wording, dates, and contacts.