The 2004 745Li is a full-size luxury sedan, embodying a commitment to performance, comfort, and advanced technology. Built on the E66 chassis, this 4-door sedan showcases the 'Ultimate Driving Machine' ethos within a luxurious platform, competing with other high-end vehicles of its era. Powered by a 4.4-liter V8 engine producing 329 horsepower and 330 lb-ft of torque, it offers a refined driving experience complemented by a 6-speed Steptronic automatic transmission with selectable driving modes. The 745Li is distinguished by its pioneering iDrive infotainment system and a suite of advanced driver assistance and safety features, including Dynamic Stability Control and a comprehensive airbag system, reflecting its position as a technologically sophisticated luxury automobile.

This manual serves as a comprehensive guide for the 2004 745Li (E66 chassis), providing essential information for owners and technicians. It covers fundamental vehicle operation, including starting, driving, and parking, alongside routine maintenance procedures such as checking fluid levels and tire pressure. The manual details the vehicle's various systems, including the powertrain, chassis, electrical system, comfort features, and infotainment. It also offers guidance on troubleshooting common issues and outlines emergency procedures. While providing owner-level information for daily use and basic checks, this manual is not intended for in-depth mechanical repairs or complex diagnostics, ensuring users can effectively understand and manage their vehicle.