The next-generation BMW 3-series sedan, codenamed G20, will replace the current F30 3-series internationally in 2019. Recent mules of the car, which have been spotted testing at the Nürburgring, suggest that the final production model will borrow design inspiration from the 2017 5-series.The biggest example of this shared design is the front bumper. It appears to feature the same three-intake layout as the next 5-series, and although the temporary headlights are heavily camouflaged, the same overall light structure will most likely be incorporated.Sources have told our sister publication Autocar UK that other changes to the G20 3-series will give it tauter features and a harder-edged exterior.

BMW's trickle-down styling approach will also be applied, meaning the 3-series will look more like the new 5-series, although it's not known how similar they will be. BMW's closest rival Mercedes-Benz has adopted a 'Russian doll' styling approach to its C, E and S-class models, which very closely match one another on major design cues. The G20 3-series is expected to feature BMW’s turbocharged, 1.5-litre, three-cylinder engine in an entry-level model, with turbocharged, 2.0-litre, four-cylinder petrol and diesel engines directly above it in the range. More potent models, including the M3, will most likely still use turbocharged, in-line six-cylinder units, but with gains in power and reductions in CO2 output.Like its predecessor, the sedan is expected to be available in both rear and four-wheel-drive forms.

When it arrives in international markets, the G20 range will have to conform to the EU’s next wave of emissions legislation. This means it will be the first generation of 3-series tasked with producing an average CO2 emissions output of less than 100g/km.BMW hasn't said when the new 3-series will make its first official appearance but it has ruled out a 2017 launch. This means, it's likely to make its debut at a 2018 motor show, most likely the Geneva or Paris motor show.

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