At a glance
What can fail
Water can seep into door latch mechanisms, washing away protective grease. In very cold, wet conditions, this may cause latches to freeze and fail to fully engage when the door closes, potentially allowing the door to open while driving.
What the fix does
Dealers will install shields on front latches, seal a drain hole in rear window trim, and apply grease to all side-door latch mechanisms.
Summarized — see the official notice for exact wording, dates, and contacts.