This week, our spies caught BMW testing the upcoming X4 M facelift, but this isn't the only new M model the Bavarian automaker is preparing to unleash. After photographing the X4 M prototype, our spies spotted BMW testing a glorious convoy of new BMW M models in the snow including the upcoming X3 M facelift, M4 Convertible, and two M4 Coupes.

When the test drivers parked the prototypes at the side of the road, our spies were able to get up close and personal with the X3 M. While the X4 M is BMW's stylish "sports activity coupe," the X3 M is a more traditional and more practical performance SUV.

Like the X4 M, the updated X3 M's design will be refreshed with new slimmer headlights and a larger, re-designed grille. And no, it won't be as large as the new M3's massive grille. The front and rear bumper will also get some minor tweaks and the taillights will sport updated graphics.

Further updates are expected inside the cabin such as a larger infotainment screen, a redesigned gear shifter knob borrowed from the new M3 and M4, and the latest iDrive 7 system. Since this is only a cosmetic facelift, we aren't expecting any changes under the hood.

The current X3 M is powered by a twin-turbo 3.0-liter six-cylinder engine producing 473 horsepower and 442 lb-ft and torque in the base model.

Adding the Competition packages increases the output to 503 hp. Even without the Competition package, the X3 M is no slouch in the performance department, with a 0-62 mph time of 4.1 seconds, while the Competition variant will do the same sprint in four seconds flat. We still don't know when BMW plans to show the new X3 M and X4 M performance SUVs to the world, but they could debut later this year after the standard versions break cover.