Rumour: 2012 BMW X3 M to feature tri-turbo six-cylinder

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According to Car Magazine, BMW is on the verge of introducing an M variant of the X3 for 2012 that may feature a tri-turbo inline-six. Borrowed from the M3, the mill will be tweaked to boost displacement from 3.0 to 3.2 litres and deploy approximately 499 ponies.