BMW 340i What Engine Powers This Iconic Sedan?

When it comes to balancing sporty handling and efficient efficiency, the BMW 340i stands out—powered by a refined engine engineered for dynamic city driving and smooth highway cruising.

The current BMW 340i typically features a turbocharged inline-six cylinder engine, specifically the BMW B48 unit in the latest generation. This 2.0-liter engine delivers a balanced blend of power—offering around 255 horsepower and 295 lb-ft of torque—while maintaining exceptional fuel economy. Its advanced turbocharging and cylinder deactivation technology optimize performance and efficiency, adapting seamlessly to driving demands.

Prior models of the BMW 340i have included both inline-six and turbocharged four-cylinder variants, but the current B48 engine marks a shift toward high-efficiency turbocharging. While earlier engines prioritized raw power, today’s B48 emphasizes smoothness and responsiveness, paired with intelligent software that enhances both acceleration and real-world fuel economy without sacrificing performance.

The B48 engine’s design supports BMW’s signature driving dynamics—delivering responsive power delivery and refined throttle response—making the 340i ideal for urban commutes and spirited highway rides alike. Its low emissions and strong reliability further enhance its appeal for modern drivers seeking efficiency without compromise.

Whether you’re drawn to the BMW 340i’s potent B48 inline-six or its predecessor’s engineered performance, understanding the engine reveals why this model remains a benchmark in its class. Explore the full specifications today and experience how BMW blends power, precision, and efficiency in every drive.

The BMW B58 is a turbocharged straight-six engine, which began production in 2015. [1] The B58 replaced the N55 and was launched in the F30 340i. [2] The B58 is part of BMW's modular engine family, each engine using a displacement of 500 cc (30.5 cu in) per cylinder, following the B38 and B48 engine.

[3] The B58 engine was named to Ward's World's 10 Best Engines five times, in 2016 (installed. In 2015, the BMWB58 turbocharged straight-six engine went into production. The N55 was replaced by the B58, which debuted with the F30 340i.

Following the B38 and B48 engines, the B58 is a member of BMW's new modular engine family, which includes engines with 500 cc (30.5 cu in) of displacement per cylinder. The B58 engine, which is found in the 340i and 440i, was designated one of the world. Discover the impressive engine specs, configuration, and maintenance requirements of the BMW 340i for optimal performance and longevity.

BMW 340i 2012-2018 3.0L Engine Specifications Detailed technical specifications and documentation for the 3.0L B58 turbocharged engine in the 2012-2018 BMW 340I. Includes performance data, maintenance guidelines, and component. Understanding what engine a vehicle has isn't just about numbers; it's about the experience it offers.

The turbocharged inline-6 in the BMW 340i embodies BMW's philosophy of sporty comfort and engineering innovation. It provides exhilarating acceleration, responsive handling, and a refined engine note that makes every drive memorable. Discover the 2024 BMW 340i review, covering reliability, performance ratings, and comparisons with competitors in its class.

View complete technical specifications for 2018 BMW 340i. Includes performance data, fuel economy, dimensions, engine details, and more. The BMW M340i (G20 generation) was introduced in 2019 as the high-performance variant of the 3 Series, replacing the previous 340i model.

Unlike the standard 330i, which uses the four-cylinder B48 engine, the M340i features the more powerful B58 inline. Detailed specs and features for the 2025 BMW 3 Series M340i including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. 2016 BMW 3 Series 340i are arriving at US dealerships now.

One of the, if not the biggest change of the 2016 LCI is the replacement of the venerable N55 engine. The N55 has been the heart of the 335i 3 Series from 2009 on. Despite being long in the tooth the engine is much loved and relatively rock solid, the new B58 engine has big shoes to fill.