A mysterious BMW has been snapped at an undisclosed assembly plant. Could it be the 2013 3-Series GT?

A mysterious BMW has been snapped at an undisclosed assembly plant.

Details are limited, but speculation suggests the model is the 2013 3-Series Gran Turismo. This seems to make sense because the car's styling mimics the 5-Series GT and it has a small rear side window that looks similar to ones seen on recent 3-Series GT prototypes.

Regardless of what it is, the BMW 3-Series GT could be unveiled later this year.

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