The BMW 3-Series was introduced nearly three years ago so it comes as little surprise that the company is working on a minor facelift for their popular sedan and wagon.

The BMW 3-Series was introduced nearly three years ago so it comes as little surprise that the company is working on a minor facelift for their popular sedan and wagon.

Recently spied undergoing testing, the facelift model sports a camouflaged front bumper and a modestly revised grille. There doesn't appear to be another other modifications but that could change by the time the production model is introduced sometime next year.

Little else is known about the facelifted model but previous reports have suggested we can expect upgraded four- and six-cylinder engines. There's no word on specifics but the 328i could adopt the 330i moniker, while the 335i could become the 340i. We can also expect a plug-in hybrid variant that could use a 245 PS (180 kW) TwinPower Turbo four-cylinder petrol engine, a 95 PS (70 kW) electric motor and a lithium-ion battery.

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