The BMW 4 Series (F32 Coupe, F33 Convertible, F36 Gran Coupe) was introduced to replace the 3 Series Coupe and Convertible, establishing a distinct, more premium identity. It features a wider track, a lower center of gravity, and bespoke suspension tuning compared to its F30 3 Series sibling. The addition of the highly successful F36 Gran Coupe brought a practical 4-door liftback body style without sacrificing the sleek silhouette. The transition from the early N-series engines to the later B-series modular engines (around 2016) marks a significant turning point in the model's reliability history.
The BMW 4 Series (F32/F33/F36) is a superb driver's car, but its reliability is entirely dependent on the model year and engine choice. Pre-2016 models with the N20 petrol engine (428i) carry significant timing chain risks and should be approached with extreme caution or avoided unless proof of chain replacement is provided. However, the 2016+ models equipped with the B48 (430i) and B58 (440i) engines are modern BMW masterpieces, offering outstanding reliability and performance. Diesel models are excellent long-distance cruisers provided the EGR recall has been completed. For the best ownership experience, aim for a post-2017 LCI model with a B-series engine.