Development work continues on the 2015 BMW 3-Series facelift as our spies have caught a sedan and wagon prototype undergoing testing.

Development work continues on the 2015 BMW 3-Series facelift as our spies have caught a sedan and wagon prototype undergoing testing.

Looking virtually identical to the outgoing model, the facelifted 3-Series will adopt a new front fascia with a revised grille and restyled air intakes.

While the exterior styling changes are relatively limited, we can expect bigger news under the hood. Nothing is official but previous reports have indicated there will be upgraded four- and six-cylinder engines as well as some new entry-level variants with the company's 1.5-liter TwinPower Turbo three-cylinder engine. We can also expect a plug-in hybrid with a TwinPower Turbo four-cylinder petrol engine, an electric motor and a lithium-ion battery.

The facelifted 3-Series sedan could be introduced later this year, so look for a possible debut at the Paris Motor Show.

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