I'd expect both sDrive and xDrive versions, but not tripple-turbo tech. Just a more powerful twin-turbo engine, just a the M135i is getting a slightly more powerful N55 engine. ATM there is no 335d F30, so I'd say the up coming versions are the 330d Turbo, M340d Twin-Turbo, and the MX50d Tripple-Turbo will be for the models starting from 5 Series, so not for 3 Series and 4 Series.
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