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BMW has dialled in a meaningful refresh for its core performance saloon, and the BMW M340i is the headline act. The straight-six flagship of the 3 Series gains more muscle and cleaner running, then shares the uplift across the wider range, with improvements also reaching the M440i line-up and the compact BMW M240i. It is a cohesive update that keeps the M340i at the sharp end of the driver’s car league while trimming waste and polishing day-to-day manners.
Under the bonnet, the 3.0-litre engine benefits from revised mild-hybrid assistance and smarter energy management, unlocking stronger torque delivery and crisper in-gear response. The calibration works hand-in-hand with xDrive to put power down cleanly, so the saloon and Touring both feel more immediate without sacrificing refinement. The same hardware and software trickle into the M440i Coupé, Convertible and Gran Coupé, plus the BMW M240i, each posting quicker sprints with the sort of linear surge that makes overtakes effortless.
Efficiency gets a proper lift, too. Tweaks to recuperation, thermal management and injector strategy help the M340i cover more distance per litre, while the M240i shows particularly clear gains on the combined cycle. Lower CO? figures follow, making these updates as relevant to the spreadsheet as they are to the steering wheel, especially for company-car drivers and long-distance commuters.
New kit rounds out the package. The 2 Series Gran Coupé adds Cape York Green to its palette, the 4 Series Gran Coupé can now be specified with Adaptive LED Headlights, and the BMW i4 adopts striking laser rear lights. Practical touches land in the 5 Series with a neat B-pillar coat hook fitted as standard, and EV owners gain a smarter Charging Guide in the My BMW app to streamline route planning and top-ups. Taken together, the changes underline BMW’s current trajectory: more performance where it counts, measurable efficiency gains, and thoughtful equipment that enhances the everyday drive.
