BMW B58 (B58TU1) Engine Specs

The BMW B58 (B58TU1) (also known as B58B30, B58B30B, or B58B30O1) is a 3.0-liter turbocharged inline-six petrol engine developed by BMW as part of the company's modular B-series engine family. Introduced in 2015, the B58 was engineered to replace the acclaimed N55 and to set a new benchmark for turbocharged six-cylinder performance, efficiency, and refinement. Designed from the outset to meet stringent Euro 6 emissions standards while delivering substantially more power and torque, the B58 quickly became the cornerstone of BMW's petrol engine lineup across multiple vehicle lines.

The B58 was developed as a clean-sheet evolution rather than a simple update of its predecessor. BMW's engineers prioritized structural rigidity, thermal efficiency, and tuning headroom, resulting in an engine architecture capable of comfortably supporting outputs well above the standard factory figures. The B58TU1 (Technical Update) variant, introduced in 2018, brought further refinements including a single-chain timing drive replacing the previous dual-chain setup, a significantly lightened crankshaft, and increased direct injection pressure raised from 200 bar to 350 bar, all of which contributed to improved response and reduced internal friction.

The B58 is built around a closed-deck aluminum alloy cylinder block, a layout that provides exceptional rigidity and resistance to cylinder wall deformation under high boost pressure - a key reason for the engine's outstanding tuning potential. The aluminum alloy cylinder head features a DOHC 24-valve layout with BMW's Valvetronic variable valve lift system and dual VANOS variable camshaft timing on both intake and exhaust camshafts, enabling precise control over the combustion process across all operating conditions. One of the most distinctive engineering choices is the fully integrated exhaust manifold cast directly into the cylinder head, which dramatically shortens the path of exhaust gases to the turbocharger and nearly eliminates turbo lag on cold starts. The single twin-scroll turbocharger and high-pressure direct injection system work in concert to deliver strong, linear power across a wide rev range.

The B58 has a bore and stroke of 82.0 mm x 94.6 mm, yielding a total displacement of 2,998 cc. The compression ratio is 11.0:1, which is notably high for a turbocharged engine and reflects BMW's confidence in the combustion efficiency of the Valvetronic/VANOS combination. Depending on the application and tune, power output ranges from 322 hp (240 kW) to 388 hp (290 kW), with torque figures spanning 450 to 500 Nm. The firing order is 1-5-3-6-2-4. Oil capacity is 6.5 liters, with BMW specifying Longlife-04 5W-30 or 0W-30 for optimal lubrication. The engine requires a minimum of 98 RON fuel to perform as intended.

The B58 powers an exceptionally wide range of BMW Group vehicles, including the BMW 2 Series (F22/F87 M2), 3 Series (F30/G20), 4 Series (F32/G22), 5 Series (F10/G30), 6 Series (F12/G32), X3 (F25/G01), X4 (F26/G02), X5 (F15/G05), and Z4 (G29). Notably, it also serves as the base for the Toyota Supra (A90), produced through a joint development agreement between BMW and Toyota. The engine's combination of smooth inline-six refinement, broad torque delivery, and strong real-world fuel efficiency in the 8-13 L/100 km range has made it a favourite among both enthusiasts and everyday drivers. With proper maintenance, the B58 is rated for a service life exceeding 300,000 km.

Alternative names and codes for this engine include B58B30, B58B30B, B58B30O1, B58B30C, B58B30M1, and B58TU1, reflecting different output variants, model years, and BMW internal designations used across technical documentation and parts catalogs. The B58's blend of advanced technology, high tunability, and proven reliability across a wide range of applications has firmly established it as one of the finest turbocharged inline-six engines produced in the modern era.