K&N performance drop-in air filter for the E6X 7 Series with M54/N52/N62/N73/M67 engine. This filter is a direct replacement for the original paper filter and offers superior filtration and improved performance. It is also cleanable and so never needs replacing. For 740i/740Li, 750i/750Li, 760i/760Li and 745d, two filters are required per vehicle.