At a glance
What can fail
A loose connection at the side airbag sensor can interrupt communication with the airbag control unit. When this happens, the system becomes oversensitive and may deploy the curtain airbag, side airbag, and seat belt pretensioner when a door closes hard, even without a crash.
What the fix does
The dealer will install a new harness and replace the side airbag sensor to restore proper connection and normal operation.
Summarized — see the official notice for exact wording, dates, and contacts.