BMW is preparing one of the biggest changes to the 3 Series in decades, and the upcoming 2027 BMW M350 is expected to play a key role in that transformation. Replacing today’s M340i, the new M350 will serve as the flagship M Performance model beneath the full-fledged M3, offering more power, sharper styling, and the latest technology while retaining BMW’s signature turbocharged inline-six engine.
Although BMW has yet to officially reveal the M350, prototype sightings, industry reports, and leaked product information have painted a fairly clear picture of what enthusiasts can expect.
Goodbye M340i, Hello M350
One of the biggest changes is the name itself. BMW is expected to retire the “i” suffix from gasoline-powered models as it reserves the designation for electric vehicles. As a result, the familiar M340i will reportedly become the M350, aligning with BMW’s evolving naming strategy as combustion and electric models coexist in the lineup.
The M350 will be based on the next-generation G50 BMW 3 Series, while an all-electric BMW i3 will serve as its EV counterpart. Unlike previous generations, the gasoline and electric models will share similar styling but ride on different platforms optimized for their respective powertrains.
More Powerful Turbocharged Six-Cylinder
Perhaps the most exciting news is that BMW isn’t abandoning its beloved inline-six.
Current reports suggest the M350 will continue using an updated version of the 3.0-liter turbocharged B58 engine paired with 48-volt mild-hybrid technology. Output is expected to reach approximately 415 to 420 horsepower—roughly 30 to 35 horsepower more than the current North American M340i. Torque is rumored to increase as well, potentially reaching around 398 lb-ft (540 Nm).
Power is expected to be sent through BMW’s familiar eight-speed automatic transmission, with xDrive all-wheel drive likely becoming standard in many markets. While rear-wheel drive could survive in select regions, BMW has not confirmed final market availability.
Fresh Neue Klasse Styling
The 2027 M350 will introduce BMW’s new Neue Klasse-inspired design language to the combustion-powered 3 Series. Spy photos reveal slimmer headlights, a cleaner front fascia, and a more minimalist interpretation of BMW’s iconic kidney grille.
As an M Performance model, the M350 should receive more aggressive bumpers, larger air intakes, quad exhaust outlets, unique wheels, and subtle aerodynamic enhancements that distinguish it from standard 3 Series variants. Recent prototypes spotted testing at the Nürburgring already display several of these performance-oriented details.
Major Interior Technology Upgrade
Inside, BMW is expected to deliver one of the most significant cabin redesigns in the history of the 3 Series.
The dashboard will likely feature BMW’s latest Panoramic Vision display system alongside a large central touchscreen running the newest generation of iDrive. Physical controls are expected to be reduced in favor of digital interfaces, while upgraded driver assistance systems and enhanced connectivity will bring the M350 in line with BMW’s newest luxury models.
Despite the technological leap, BMW is expected to maintain the driver-focused cockpit that has made the 3 Series a benchmark sports sedan for decades.
Positioned Between the 340i and M3
The M350 will continue to fill the gap between standard 3 Series models and the high-performance M3.
For buyers seeking everyday usability with serious performance, the M350 should offer near-M3 acceleration while delivering greater comfort, lower running costs, and improved fuel efficiency thanks to its mild-hybrid system. It will likely remain one of BMW’s best all-around performance sedans, combining practicality with impressive straight-line speed and refined handling.
With the next-generation M3 reportedly arriving later than the standard G50 lineup, the M350 could temporarily become the fastest gasoline-powered 3 Series available when the new generation launches.
Expected Launch
BMW is expected to unveil the next-generation 3 Series during 2026 before the model reaches dealerships as a 2027 model. Production leaks indicate manufacturing could begin in late 2026, although BMW has not officially confirmed launch timing or specifications.
While many details remain unofficial, the 2027 BMW M350 is shaping up to be a worthy successor to the M340i. A more powerful turbocharged inline-six, updated styling inspired by BMW’s Neue Klasse design philosophy, cutting-edge interior technology, and refined chassis upgrades should keep it among the most compelling sport sedans in its class.
Until BMW unveils the production model, many specifications remain subject to change. However, if current reports prove accurate, the M350 will preserve the traditional BMW driving experience while embracing the brand’s next generation of design and technology.
