What Engine Is In A Bmw 340i
By the Editorial Staff
March 16, 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. 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. 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. 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. 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.
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 BMW F30 3 Series Sedan LCI 340i has a Inline 6, Petrol engine with 2998 cm 3 / 182.9 cu-in capacity.
How many horsepower (hp) does a 2015 BMW F30 3 Series Sedan LCI 340i have? BMW's M340i is a luxury car with some power behind it, but strangely enough, its engine isn't custom-built. It's repurposed from an older BWM model.
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.