It is known internally as the F31 and has grown a little to create more space for the interior where an extra touch of practicality has been added.
The BMW 3-Series Touring (F31) prototypes have now lost nearly all of their camouflage as the model's official unveiling quickly approaches. The latest pictures show the new model undergoing testing in wet conditions.
The engine line-up from its sedan sibling will be carried over to the wagon variant. This will include a turbocharged 2.0-liter petrol with outputs of 184 PS (135 kW / 181 bhp) and 245 PS (180 kW / 241 bhp) as well as a 3.0-liter inline-six with 320 PS (235 kW / 315 bhp) and 450 Nm (332 lb-ft) of torque.
Diesel options will include a 2.0-liter unit producing 143 PS (105 kW / 141 bhp) or 184 PS (135 kW / 181 bhp).
The first 2013 BMW 3-Series Wagon models will arrive in European dealerships in the Autumn.