Under the bonnet, the Active Tourer and Gran Tourer get received new efficiency-boosting powertrain tech. And all engines benefit from a friction-reducing machining technique, and diesel models get a selective catalytic reduction system that uses AdBlue to reduce NOx emissions.
These engine tweaks increase power in the petrol engines by up to 7bhp and torque by up to 7lb ft, while fuel efficiency has increased by around 5%.
BMW has also uprated the fuel injection system. The updated MPVs are now available with a more efficient seven-speed dual-clutch gearbox, with the seventh gear given an especially long ratio for greater fuel economy on long, fast journeys.