The BMW 3 Series (E46) represents a pinnacle of German engineering, produced globally between 1998 and 2006. For the 2004 model year, this premium compact executive vehicle is renowned for its exceptional driving dynamics, balanced chassis, and a driver-focused cockpit, embodying the philosophy of "Sheer Driving Pleasure." Available in various body styles including Sedan, Coupe, Convertible, and Touring, the E46 offered a range of smooth and powerful inline-four and inline-six engines, with horsepower ranging from 143 hp to 231 hp. Its competitive standing was solidified against marques like Mercedes-Benz, Audi, Lexus, and Infiniti, frequently earning accolades such as inclusion on Car and Driver's 10Best list. This comprehensive Factory Service Repair Manual, written in English, provides in-depth technical information for the 2004 model. Spanning over 1500 pages, it covers all essential maintenance procedures, detailed component removal and installation, and complex repair processes. The manual delves into engine management, fuel, cooling, exhaust, ignition, transmission (manual and automatic), drivetrain, suspension, steering, and braking systems. Furthermore, it includes extensive coverage of electrical systems, bodywork, interior trim, climate control, and safety features like the SRS airbag system. With factory-level detail, including wiring diagrams and special tool requirements, this resource is invaluable for owners and technicians seeking to maintain, diagnose, and repair the vehicle to exacting standards.