Bmw B58 240i
By the Editorial Staff
March 24, 2026
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. 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.
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We analyze millions of used cars daily. This B58-powered BMW M240i xDrive coupe can run the quarter-mile in just 7.9 seconds at 175 mph, making it the quickest BMW on the planet. Does the 2017 M240i have a B58? The M240i picks up where the previous M235i left off, with a similar combination of the virtues of a big engine in a small car.
As indicated by the new car's badge, the engine has been upgraded to the same B58 generation inline-six that BMW uses in the 340i, but it has been tweaked to deliver slightly more power. The BMW B58 engine powers many of the brand's high-performance sedans, coupes, SUVs and sports cars. Find out exactly which BMW models utilize this acclaimed 3.0L turbo inline.
No matter which B58-powered BMW model you choose, you'll be treated to an invigorating driving experience backed by BMW's legendary engineering. The B58 engine provides the perfect blend of performance, refinement, and efficiency to make every drive through San Jose a joy. Learn about the BMW B58.
Frequently asked questions. B58 general info, maintenance, problems, tuning and more. BMW B58 240i, 340i, 440i FAQ.
BMW 2 Series M240i with a 1500-HP B58 engine, achieving 7.9 seconds at 175 mph in the quarter. BMW / M140i & M240i BMW M140i & M240i Tuning The BMW B58 3.0 straight six Twinscroll turbo engine is one of the most impressive power units we have worked with. This engine has so much untapped potential that its standard 335bhp and 369lbft are dramatically increased with even the simplest of upgrades.