This manual covers the BMW N74 engine, a V12 Twin-Turbocharged powerhouse. Engineered for exceptional performance and refined driving dynamics, this engine features a 6.0-liter displacement, direct injection, and a robust aluminum alloy construction for both the engine block and cylinder heads. Its sophisticated valvetrain, utilizing DOHC with four valves per cylinder and roller cam followers, contributes to its impressive power output of 544 hp and 750 Nm of torque. The twin-turbocharging system, combined with forged steel components and a timing chain drive, ensures reliable and potent delivery across a wide RPM range, making it a benchmark in automotive engineering. This English-language Engine Service Manual provides comprehensive guidance for maintaining and repairing the BMW N74 engine. It details critical technical specifications, including bore, stroke, compression ratio, and lubrication requirements, alongside recommended maintenance procedures such as oil changes with BMW Longlife-01 oil and an approximate capacity of 8.5 liters. The manual is an essential resource for owners, technicians, and mechanics, offering in-depth information to ensure the optimal performance, longevity, and reliability of this high-performance V12 engine.