What Engine Powers the BMW 340i: A Precision-Ingined Inline-Six
The BMW 340i stands as a benchmark in the executive sedan segment, powered by a refined and responsive engine that combines efficiency with dynamic performance.
The 3.0-Liter Inline-Six Engine
At the heart of the BMW 340i lies a 3.0-liter inline-six (B58) engine, engineered for balance and responsiveness. Boasting 381 horsepower and 433 lb-ft of torque, this turbocharged four-cylinder inline-six delivers smooth acceleration and refined cruising while maintaining fuel efficiency. Its finely tuned combustion process ensures both power and low-end torque, making it ideal for daily driving and spirited highway cruises.
Engine Technology and Performance Features
This engine integrates BMW’s TwinPower Turbo technology, enhancing efficiency without sacrificing performance. Paired with a 8-speed automatic transmission, the 340i achieves seamless gear shifts and instant power delivery. Advanced engine management systems optimize fuel injection and exhaust flow, delivering a harmonious blend of performance and economy, consistent with BMW’s commitment to precision engineering.
Build Quality and Reliability
Designed for durability, the B58 engine features robust materials and precision manufacturing to endure demanding conditions. With rigorous testing and continuous refinement, it reflects BMW’s reputation for long-term reliability, offering peace of mind alongside exhilarating driving dynamics.
The BMW 340i’s 3.0-liter inline-six engine is more than a powerplant—it’s a masterpiece of modern automotive engineering. Designed for performance, efficiency, and lasting quality, it sets a clear standard in its class. Explore its capabilities today and experience the future of driving performance.
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.