The first-generation BMW 4 Series (F32 for the Coupe, F33 for the Convertible, F36 for the Gran Coupé) was introduced to replace the coupe and convertible versions of the 3 Series (E92/E93). It stands out with wider tracks, a lowered center of gravity, and a more aggressive design. The Gran Coupé (F36) model, which appeared in 2014, achieved immense commercial success by combining the sleek lines of a coupé with the practicality of rear doors and a large tailgate. Technically, it shares most of its underpinnings and engines with the 3 Series F30. Its career is marked by a major mechanical transition in 2015/2016, moving from the old generation of engines (N20, N47, N55) to BMW's new modular architecture (B47, B48, B58), radically transforming its reliability record.
The BMW 4 Series (F32/F33/F36) is a car with two faces. Models produced between 2013 and 2015, equipped with N20 and N47 engines, present major financial risks related to their timing systems. In contrast, from 2016 onwards, the introduction of modular engines (B48, B58 for petrol; B47 for diesel) transformed the 4 Series into one of the most reliable coupes on the market. The ideal choice, combining absolute reliability, performance, and practicality, is a 440i Gran Coupé LCI (post-2017). For high-mileage drivers, a post-2016 420d or 430d is excellent, provided the EGR recall has been performed.