A prototype of the BMW 3-Series facelift equipped with a plug-in hybrid system has been spied undergoing testing around the Nurburgring.

A prototype of the BMW 3-Series facelift equipped with a plug-in hybrid system has been spied undergoing testing around the Nurburgring.

The 3-Series compact sedan is about to go through a LCI (Life Cycle Impulse) which judging by the light camouflage on this prototype will bring only modest cosmetic tweaks to both bumpers. High-end versions are getting adaptive full LED headlights teamed up with full LED taillights that will likely receive slightly different graphics.

More importantly, BMW will offer the 3-Series as a "328e" model with a plug-in hybrid setup as previewed by last year's prototype. It will likely carry over the 2.0-liter 4-cylinder turbocharged gasoline engine, electric motor and revised 8-speed Steptronic gearbox. Combined output will stand at approximately 245 HP (180 kW) and 400 Nm (295 lb-ft) torque while average fuel consumption should be of just 2 liters / 100 km (117 mpg US or 140 mpg UK).

The BMW 3-Series plug-in hybrid prototype is able to cover up to 22 miles (35 km) running solely on electric power during which it can hit 74.5 mph (120 km/h). It has a lithium-ion battery pack mounted underneath the trunk which can be recharged from a regular socket through the cap installed on the left front wing.

BMW will probably unveil the revised 3-Series lineup in September at the Frankfurt Motor Show.

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BMW 3-Series facelift spied testing hybrid setup at the Nurburgring