This manual covers the 3-Series E46 models produced from 1999 through 2005. Known for its exceptional driving dynamics, refined engineering, and premium appeal, the E46 generation represents a significant chapter in history, frequently earning accolades such as Car and Driver's '10Best' awards. The model line-up offered a range of inline-six engines, including the lauded M54 series, and was available in various body styles, including Sedan, Coupe, Convertible, and Touring wagon. The high-performance M3 variant, equipped with the potent S54 engine, further cemented the E46's reputation for sporty performance and build quality. This comprehensive workshop service repair manual provides in-depth technical information for the maintenance, diagnosis, and repair of your 3-Series E46. It details procedures for all major systems, including the powertrain (engines M52TU, M54, S54, transmissions, driveline), chassis (suspension, steering, brakes), and electrical systems. Essential maintenance schedules, troubleshooting guides, diagnostic trouble code interpretation, and detailed technical specifications are included, offering factory-level knowledge. This resource is designed to assist owners, independent repair shops, and technicians in effectively maintaining and repairing these vehicles, ensuring optimal performance and longevity.