The BMW 7 Series is a full-size luxury sedan produced by the German automaker BMW since 1977. It is the successor to the BMW E3 "New Six" sedan and is currently in its sixth generation. The 7 Series is BMW's flagship car and is only available as a sedan (including long wheelbase and limousine models). It traditionally introduces technologies and exterior design themes before they trickle down to other models in BMW's lineup. The first generation 7 Series was powered by straight-6 petrol engines, and following generations have been powered by inline-4, straight-6, V8 and V12 engines with both natural aspiration and turbocharging. Since 1995, diesel engines have been included in the 7 Series range. Unlike the 3 Series and 5 Series sedans, BMW has not produced an M model for the 7 Series. However, in 2014 an "M Performance" option became available for the 7 Series.