B58 Engine Performance in the 2020 BMW 340i: Power, Precision, and Driveability

The 2020 BMW 340i powered by the B58 engine stands as a benchmark in modern compact luxury performance, delivering a seamless blend of power and precision. Built on BMW’s modular B58 architecture, this inline-six cylinder engine produces 382 horsepower in the 340i, paired with a 8-speed automatic transmission for responsive acceleration and refined drivability. Drivers enjoy a balanced driving experience—whether merging onto a highway or navigating city streets—thanks to the engine’s smooth torque delivery and intelligent power management.

Beyond raw performance, the B58 engine emphasizes efficiency, achieving up to 21 mpg combined, thanks to technologies like cylinder deactivation and optimized combustion. Its compact design allows for flexible packaging, enabling BMW to maintain the 340i’s sporty handling and premium cabin feel. Owners praise its low-revving smoothness and minimal noise, making daily commutes enjoyable while still delivering thrilling moments on the open road.

In summary, the B58 engine in the 2020 BMW 340i delivers exceptional power, refined efficiency, and driving pleasure—making it a standout choice for enthusiasts and discerning drivers alike. Experience the perfect fusion of performance and practicality; consider test driving the 2020 340i today to feel the B58 engine in action.

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The B58 engine in the 2020 BMW 340i delivers exceptional power, refined efficiency, and an unmatched driving experience. Whether you prioritize dynamic performance or everyday usability, this engine delivers a compelling proposition. Discover the perfect blend of sport and sophistication—test drive the 2020 BMW 340i and feel the B58 engine in action today.

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. Woodcliff Lake, NJ - Jan.

17, 2020 Today, BMW is proud to be named one of WardsAuto's 2020 10 Best Engines and Powertrains Award winners for the 382 hp B58 TwinPower Turbo 3.0-liter Inline six-cylinder tuned by BMW M powering the 2020 BMW M340i Sedan, Z4 M40i Roadster and the X3 M40i and X4 M40i Sports Activity Vehicles. 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.

The B58 engine is featured in various BMW models, including the M340i and 340i from the 3 Series, certain variants of the 5 Series and 7 Series, X Series SUVs like the X3 M40i, X5, X6, and X7, as well as the Z4 Roadster and some 8 Series models. Comprehensive technical specifications and detailed documentation for the 2019-Present BMW 340i 3.0L inline-6 turbocharged engine (B58B30). Covers engine performance metrics, torque curves, fuel injection system, turbocharging, cooling system, lubrication system, and emissions control.

Includes detailed technical data for maintenance, diagnostics, and repair procedures. BMW is updating its B58 six-cylinder engine for the M240i, M340i, and M440i. Power rises to 386 hp with more torque, while fuel consumption drops.

Here's what's new for November 2025. BMW B58 General Information FAQ's Below is some general FAQ's including specs, design, and more about the BMW B58 engine. What is the BMW B58? BMW's B58 engine is a 3.0L inline-6 turbocharged, direct injection gasoline engine produced from 2016-present.

As with the N55, the B58 engine uses a single twin. The B58 engine has been utilized across a variety of BMW models, showcasing its versatility and adaptability. Below is a list of notable vehicles that feature this remarkable engine: BMW 3 Series (G20) - The B58 powers the 340i variant, delivering exhilarating performance and a dynamic driving experience.

BMW 4 Series (G22) - Similar to the 3 Series, the 440i and M440i models benefit from. BMW introduced the B-series of modular engines in 2016. But there was a major update done in 2018 and then another for 2020.

The B46 4-cylinder is pretty simple with only minor updates. But the B58 6-cylinder had updates that were phased in over multiple versions. B58A being the original.

B58C having some major changes (but only used on a few.