According to BMW NA, it's a service bulletin B11 16 18, not a recall as stated earlier. They are to inspect screen filters and other components in the oil pan for the presence of metal fragments. If metal found, replace engine. They said the service bulletin should be available at service centers by now.
Since they're also doing the inspections on pre-delivery vehicles, then BMW must believe that the metal fragments are already in the engine as the vehicle leaves the factory.
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