The Life Cycle Improvement, in other words the facelift, of the BMW 3 series was not big. However there were several improvement made to the car. The 4 series LCI will be same story. The front and rear bumper will have slight differences and also the front grille will have a different structure.
The head- and taillights will have the biggest differences. The new LED headlights will be on the 4 series option sheet as well. The taillights will also be made with LEDs instead of the partly halogen bulbs that are used in the current model. Of course these updates are also for the 4 series Convertible and Gran Coupe