Breaking Dawn Part 2 got its MPAA rating yesterday: PG-13. No big surprise. The film is rated PG-13 for "sequences of violence including disturbing images, some sensuality and partial nudity."
Previous films have received PG-13 ratings for:
Twilight: "some violence and a scene of sensuality."
New Moon: "some violence and action."
Eclipse: "intense sequences of action and violence, and some sensuality."