Engine BMW 1 serie xDrive 135i F20 F21 320 326 Ps N55B30A. When it comes to performance, precision, and reliability in the world of compact sports cars, the BMW 1 Series xDrive 135i (F20/F21) equipped with the N55B30A engine stands out as an engineering marvel.  Phone: (929) 376-7413 Email: [email protected]