The next generation BMW M3 sedan has been caught testing around the Nurburgring race track a couple of times, but the folks over at BMW have now moved on to public roads. These latest spy shots reveal even more details, including those wide fenders.

The future M3->ke2366 may still be heavily camouflaged, but we already know that it will feature a new design language leaning more towards aggressiveness and sportiness. The wider fenders stand out, as do the big air intakes in the front bumper. BMW have also added bigger brakes and quad exhaust pipes in typical M fashion.

As far as power goes, we've heard a number of rumors surrounding the engine for the future M3. Four different engine were rumored, including both V6 and V8 variations, but the most interesting is the tri-turbo theory. BMW recently filed a new patent for electric-powered turbocharger technology, which suggests the future M3 will be powered by a fresh 3.3-liter six-cylinder engine equipped with three turbos – one powered by electricity, rather than the exhaust gases. This new engine could deliver up to 450 HP.

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