The M440i nameplate was introduced by BMW for the second-generation 4 Series as the performance-oriented six-cylinder flagship above the four-cylinder 430i. It arrived for the 2021 model year on the new 4 Series Coupe, reaching customers after the global launch in late 2020, and it quickly became the range’s defining straight-six variant. BMW later extended the same nameplate to the 4 Series Gran Coupe and Convertible family as those body styles were refreshed and added to the lineup, making M440i the common designation for the top non-M 4 Series models rather than a one-off special edition.
In BMW’s modern naming structure, the M440i sits between the core 4 Series models and the full M4, serving as the bridge for drivers who want the greater performance, chassis tuning, and visual distinction of an M Performance model without moving to a full M car. Its launch marked a notable shift for the 4 Series line, because the badge was tied to the redesigned G22-generation coupe and its related derivatives rather than carried over from the prior generation. Over time, BMW has refined the M440i formula with updates to its engines, electronics, and mild-hybrid technology, but the model’s role has remained consistent: it is the enthusiast-focused, inline-six 4 Series offering in the regular BMW lineup.