The images, leaked by the Russian edition of Top Gear, come hot on the (boot-less) tail of the Mazda 3 hatch revealed last week, and show a four-door design that from some angles mimics the bigger Mazda 6 sedan.
The elongated look and narrow glasshouse of the five-door hatch means there's a natural visual relationship with the Mazda 3 sedan, with all the changes coming at the rear.
Expect some extra boot space from the sedan that is 120mm longer than the hatch.
The sedan will share its engines and drivetrains with the hatch, including 114kW/200Nm 2.0-litre and 138kW/250Nm 2.5-litre four-cylinder petrol engines. The latter engine, derived from the larger Mazda 6, is currently offered as an SP25 model for the hatch, and the same should be the case for the sedan.
A 110kW 2.2-litre diesel engine found in the CX-5 SUV and Mazda 6 medium car can be expected to join the Mazda 3 range not long after the petrol models launch locally in early 2014.