Used BMW M340i B58B30O1 3.0L Engine For Sale

BMW M340i B58B30O1 3.0L Engine For Sale
Specifications, Compatible Vehicles.

BMW M340i B58B30O1 3.0L Engine is a turbocharged inline-six engine, found in the acclaimed BMW M340i (G20/G21), represents one of BMW’s most refined and powerful engines from the brand’s modern modular B-series lineup. As a second-generation B58 engine, it was engineered to deliver an ideal balance between exhilarating performance, smoothness, and daily usability. Built with precision German engineering, this power unit combines advanced turbocharging, direct fuel injection, and a lightweight aluminum design to provide a perfect blend of power and efficiency, making it a top choice for drivers seeking reliability and high performance.

Under the hood, the BMW M340i B58B30O1 3.0L Engine featuring a single twin-scroll turbocharger, direct injection, variable valve timing (VANOS), and Valvetronic variable lift technology. This setup ensures instant throttle response and optimal torque delivery throughout the rev range. The engine produces an impressive 382 horsepower (285 kW) and 500 Nm (369 lb-ft) of torque, allowing vehicles like the BMW M340i to accelerate from 0–100 km/h in just 4.2 seconds. It also complies with Euro 6 emissions standards, offering cleaner performance without compromising power. Cooling efficiency is enhanced through an integrated water-to-air intercooler and an updated heat management system, ensuring consistent output even under demanding conditions.

The B58B30O1 engine is not exclusive to the M340i; it’s also compatible with several other BMW models, including the BMW Z4 M40i (G29), Toyota Supra GR (A90/A91), BMW X3 M40i, BMW X4 M40i, and BMW 540i G30. Thanks to its adaptable architecture and smooth performance, this engine is widely sought after as a replacement or upgrade for those who value both refinement and raw power. The B58’s modular construction makes it easier to maintain and service compared to previous N54 and N55 engines, offering enhanced durability and reduced maintenance costs over its lifetime.

Common Weaknesses & Maintenance Notes

However, like any high-performance engine, the BMW B58B30O1 has some common weaknesses to note. A few owners have reported coolant leaks from plastic expansion tanks, oil filter housing gasket leaks, and high-pressure fuel pump failures over extended mileage. Although less frequent than older BMW turbo engines, carbon buildup on intake valves may still occur over time due to direct injection design. The turbo wastegate rattle and minor PCV valve issues have also been mentioned, though these are typically resolved through timely servicing or part upgrades.

To ensure long-term reliability, regular oil changes every 8,000–10,000km using BMW-approved 5W-30 full synthetic oil are recommended. Routine coolant checks, spark plug replacements, and fuel system cleaning will help maintain peak performance. With proper care, the B58B30O1 engine is known to exceed 300,000km without major issues, maintaining its renowned smoothness and power.

For those seeking a BMW M340i B58B30O1 3.0L Engine for sale, this power unit offers unmatched performance, durability, and engineering excellence. Whether for replacement or performance enhancement, the B58B30O1 stands out as one of BMW’s most reliable and advanced inline-six engines ever built—an ideal choice for enthusiasts and daily drivers alike.