BMW Z4 M40i B58B30A 3.0L Turbocharged petrol Engine

BMW Z4 M40i B58B30A 3.0L turbocharged diesel engine.

Specifications and Compatibility.

BMW Z4 M40i B58B30A 3.0L turbocharged petrol Engine is one of BMW’s most advanced and best-performing modern powertrains, engineered for exceptional responsiveness, smooth power delivery, and long-term reliability. As part of BMW’s renowned B58 engine family, this unit is celebrated for combining strong performance with everyday usability, making it a top choice for enthusiasts seeking a powerful and dependable replacement engine. 

The B58B30A is equipped with a twin-scroll turbocharger, high-precision direct injection, and a closed-deck engine block design—innovations that significantly boost durability, efficiency, and thermal stability. If you are looking for a premium engine upgrade or a direct replacement for your Z4 M40i, this B58 engine offers outstanding value and performance.

This BMW Z4 M40i B58B30A 3.0L turbocharged Petrol engine is fully compatible with the BMW Z4 M40i (G29, 2019–present). It is also found in various BMW and Toyota models, including certain versions of the BMW M340i, M240i, 540i, and the Toyota GR Supra (depending on ECU mapping and configuration). These shared platforms highlight the engine’s versatility and high-performance reputation. 

Common weaknesses and Maintenance.

Whether you are restoring your Z4 to factory specifications or upgrading a compatible chassis for improved power, the B58B30A ensures exceptional results with its smooth, refined delivery and impressive tuning potential.

In terms of specifications, the BMW B58B30A displaces 2,998 cc and produces around 382 hp and 500 Nm of torque, depending on the model year and market. Its twin-scroll turbocharger improves throttle response and minimizes lag, while the water-to-air intercooler enhances cooling efficiency for consistent performance. The engine’s closed-deck aluminium block, integrated exhaust manifold, Valvetronic variable valve control, and high-precision fuel injection all work together to create a highly efficient, strong, and reliable performance engine suitable for sporty driving and long-distance cruising.

Although the B58 engine family is known for its reliability, there are a few common weaknesses to be aware of. Some units experience coolant leaks from the water pump or thermostat housing, especially at higher mileage. Oil filter housing gasket seepage can occur over time if not regularly inspected. Carbon build-up on intake valves, while not as severe as earlier BMW engines, can appear on high-mileage engines due to direct injection. On aggressively driven vehicles, PCV system wear and turbo heat-related stress may also arise. Fortunately, these issues are easily manageable with preventative care.

For long-term reliability, routine oil changes with high-quality synthetic oil, regular coolant system inspection, and timely gasket replacement are essential. With proper maintenance, the BMW Z4 M40i B58B30A 3.0L turbocharged Petrol engine delivers exceptional longevity, smooth performance, and powerful acceleration—making it one of the finest modern inline-six engines available today.

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