The BMW B58 is a turbocharged

straight-six engine The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine bala ...

, which began production in 2015. The B58 replaced the N55 and was launched in the F30 340i. The B58 is part of BMW's new modular engine family, each engine using a displacement of per cylinder, following the B38 and B48 engine. The B58 engine was named to

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World's 10 Best Engines 4 times, in 2016 (installed in the 340i), 2017 ( M240i), 2019 ( X5) and 2020( M340i). The S58 engine, which was released in early 2019, is the high-performance version of the B58.

Design

Compared with its

BMW N55 The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo. The N55 was BMW's first straight-six engine to use a twin-scroll t ...

predecessor, the B58 features a 20% increase in boost pressure, a closed-deck

engine block In an internal combustion engine, the engine block is the structure which contains the cylinders and other components. In an early automotive engine, the engine block consisted of just the cylinder block, to which a separate crankcase was atta ...

design, an increase in

compression ratio The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values. A fundamental specification for such engines, it is measured two ways: the stati ...

to 11.0:1 and a slight increase in

displacement Displacement may refer to: Physical sciences Mathematics and Physics * Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path ...

from with added weight of . The

turbocharger In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

is a twin-scroll design, for more efficient power delivery with less turbo lag and more power than a conventional single turbocharger, as well as for weight and space saving benefits. The

intercooler An intercooler is a heat exchanger used to cool a gas after compression. Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas turbines. Internal combustion engines Mo ...

- a water-to-air design - is integrated into the intake plenum, to reduce the volume of air between the turbocharger and the cylinders. As per the N55, the B58 also features direct fuel injection,

variable valve timing In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with var ...

(called double Vanos by BMW), and

variable valve lift Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, ...

(called

Valvetronic The Valvetronic system is a BMW variable valve lift system which, in combination with VANOS, allows infinite adjustment of the intake valve timing and duration. The system claims to improve fuel economy and emissions, and negates the need for ...

by BMW). The redline remains at 7,000 rpm, the bore and the

stroke A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...

is . The B58 also features an engine-mounted heat encapsulation system to reduce engine wear and emissions during start-up. For durability and longevity, the rotating assembly has a forged steel crankshaft and forged connecting rods. As a part of BMW's new modular engine family, the crankcase is a completely new design identical to the B57 diesel version, engineered as both a gasoline and diesel engine in one common part. The closed deck crankcase is equipped with a completely new structure which can be identified by a complex array of ribs on the exhaust and intake side and an additional reinforcement frame on the oil pump side. The engine was revised in 2018, dubbed "B58TU", with notable changes and improvements. The fuel system was updated with 75% increased pressure with updated high pressure fuel pump and injectors, a new particulate filter in the catalytic converter, a new one-part timing chain as opposed to the earlier two-part, and new separate cooling circuits for the cylinder head and crankcase. For weight savings, the crankcase wall thickness and forged crankshaft were optimized, and the exhaust manifold was integrated into the cylinder head housing. B 58 engine on Bmw 340i

Models

B58B30M0: 240 kW (322 HP) version

Applications: *2015–2019 F30/F31/F34 340i *2016–2019 F32/F33/F36 440i *2016–2019 G11/G12 740i/Li

B58B30M0: 250 kW (335 HP) version

Applications: *2016–2019 F20/F21 M140i *2016–2021 F22/F23 M240i *2017–2019 G30/G31 540i *2017–2019 G32 640i

B58B30M0: 265 kW (355 HP) version

This version was used for 3-/4-Series with the "M Performance Power and Sound Kit". Applications: * 2016–2019 F30/F31/F34 340i * 2016–2019 F32/F33/F36 440i * 2017–2019 G01 X3 M40i * 2018–2019 G02 X4 M40i

B58B30M1: 250 kW (335 HP)

Applications: * 2018–present G05 X5 xDrive40i/sDrive40i * 2018–present G07 X7 xDrive40i * 2018–present G29 Z4 M40i (in countries subject to EU emissions standards) * 2020–present G30/G31 540i * 2020–present G32 640i * 2020–present G06 X6 xDrive40i * 2020–present G11/G12 740i * 2019–present G14/G15/G16 840i * 2019–present Morgan Plus Six * 2022–present

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B58B30C: 250 kW (335 HP)

* 2020

Toyota Supra is a sports car and grand tourer manufactured by the Toyota Motor Corporation beginning in 1978. The name " supra" is derived from the Latin prefix, meaning "above", "to surpass" or "go beyond". The initial four generations of the Supra were ...

B58B30O1: 285 kW (382 HP)

Applications: * 2018–present G29 Z4 M40i (in countries not subject to EU emissions standards) * 2019–present

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M340i *2019–present G21 M340i * 2020–present G01 X3 M40i * 2019–present G02 X4 M40i * 2020–present G22 M440i * 2021–present

(in countries not subject to EU emissions standards) * 2021–present G42 M240i * 2021–present Boldmen CR4

S58

The S58 engine is the high-performance version of the B58 engine. It was introduced in the F97 X3 M and F98 X4 M, marking the first time a stand-alone M model was produced for the X3 and X4. The S58 features twin mono-scroll turbochargers, a compression ratio of 9:3:1, a redline at 7,200 rpm with the bore and the

at . It also features a forged chrome molybdenum heat-treated steel crankshaft, plus forged steel connecting rods and pistons. The pistons are forged by Mahle and feature their proprietary anti-friction coating. Like the B58, the S58 also features direct fuel injection,

(called double Vanos by BMW), and

(called

by BMW). As opposed to the B58, the S58 features a slightly smaller displacement, increased bore, decreased stroke, and larger valves. Compression is decreased to 9.3:1 from 11.0:1. The S58 favors top-end power and has a higher redline of 7,200 RPM.

S58B30T0: 338 kW (453 HP)

* 2023–present G87 M2

S58B30T0: 344 kW (462 HP)

* 2019-2022

Alpina B3

S58B30T0: 353 kW (473 HP)

Applications: * 2019–present F97 X3 M * 2019–present F98 X4 M * 2021–present G80 M3 * 2021–present G82 M4

S58B30T0: 364 kW (495 HP)

* 2023-present

Alpina B3

S58B30T0: 375 kW (503 HP)

Applications: * 2019–present F97 X3 M Competition * 2019–present F98 X4 M Competition * 2021–present G80 M3 Competition * 2021–present G82 M4 Competition

References

{{BMW automotive petrol engines: 2000s to 2010s BMW engines Products introduced in 2015 Straight-six engines Gasoline engines by model