BMW B58
The BMW B58 is a turbocharged straight-six engine, which began production in 2015. The B58 replaced the N55 and was launched in the F30 340i.
| BMW B58 | |
|---|---|
B58B30O1 in a G22 M440i | |
| Overview | |
| Manufacturer | BMW |
| Production | 2015–present |
| Layout | |
| Configuration | Straight-six |
| Displacement | 3.0 L (2,998 cc) |
| Cylinder bore | 82 mm (3.23 in) |
| Piston stroke | 94.6 mm (3.72 in) |
| Cylinder block material | Closed-deck aluminium |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC 4 valves x cyl. with Valvetronic and Double VANOS |
| Valvetrain drive system | Chain |
| Compression ratio | 11.0:1 |
| RPM range | |
| Max. engine speed | 7,000 rpm |
| Combustion | |
| Supercharger | 48V electrical systems Starter Generator (2020; some models) |
| Turbocharger | Single twin-scroll turbocharger with air-to-liquid intercooler |
| Fuel system | Direct injection |
| Management | Bosch Di-Motronic |
| Fuel type | Petrol |
| Oil system | Wet sump with water heat exchanger |
| Cooling system | Water-cooled |
| Output | |
| Power output | 240–285 kW (322–382 hp) |
| Torque output | 450–500 N⋅m (332–369 lb⋅ft) |
| Dimensions | |
| Dry weight | 139 kg (306 lb) |
| Chronology | |
| Predecessor | BMW N55 |
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.
The B58 engine was named to Ward's World's 10 Best Engines four 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. It was named to Ward's World's 10 Best Engines in 2023 (installed in the M2).
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