The update will see the 3 Series take a few design ideas from the recently updated 5 Series and Z4. New engines are also expected to be unveiled.
Following the launch of the 5 Series Gran Turismo, the German company may also release a 3 Series Gran Turismo. It's still unclear if that will eventuate given sale figures for the 5 Series GT worldwide are still to prove themselves.
The new BMW 3 Series wagon will go head to head against its German and European rivals such as the Audi A4 Avant and C-Class Touring.