The BMW 3 Series (E46) M3 Sedan, produced between 1999 and 2005, represents a pinnacle of performance engineering, blending exhilarating driving dynamics with the practicality of a sedan. Developed by BMW M, this model is renowned for its motorsport-derived S54B32 engine, a naturally aspirated 3.2-liter inline-six that delivers 333 horsepower and features individual throttle bodies for an immediate throttle response. Its chassis, honed for exceptional handling, includes a limited-slip differential and is complemented by advanced systems like Automatic Stability Control and Dynamic Stability Control. The E46 M3 is celebrated for its driver engagement and has earned significant acclaim from automotive press for its performance and handling capabilities, making it a highly sought-after vehicle for enthusiast drivers. This comprehensive Workshop Service Repair Manual provides in-depth guidance for the BMW 3 Series (E46) M3 Sedan, covering all aspects necessary for meticulous maintenance and repair. The manual details procedures for the powertrain, including the S54B32 engine and both manual and SMG transmissions, as well as chassis systems such as suspension, steering, and brakes. It also addresses electrical systems, bodywork, interior components, and HVAC. With factory-level detail, troubleshooting guides, and step-by-step instructions for disassembly and reassembly, this English-language manual is an indispensable resource for professional technicians and experienced DIY mechanics. High-quality diagrams and exploded views further enhance its utility, ensuring accurate and efficient work.