The 3 Series (E46) generation, produced from 1999 to 2005, established itself as a benchmark in the premium compact executive segment, celebrated for its exceptional driving dynamics, robust engineering, and refined interiors. This model line, encompassing variants such as the M3, 323i, 325i, 325xi, 328i, 330i, and 330xi across sedan, coupe, convertible, and sports wagon body styles, consistently earned accolades for its balanced chassis and responsive performance. The E46’s design emphasized driver engagement, offering rear-wheel drive as standard with the availability of all-wheel drive, and featured advanced technologies for its era, including sophisticated engine management systems and driver aids like Dynamic Stability Control. This comprehensive workshop manual serves as an indispensable resource for owners, technicians, and enthusiasts seeking to maintain and repair their 3 Series (E46). Covering over 1200 pages, it delves into a wide array of systems and procedures, including detailed maintenance schedules, engine diagnostics and overhauls, transmission service, suspension and steering alignment, brake system repairs, and extensive electrical system troubleshooting with color-coded wiring diagrams. The manual also addresses common issues, provides specifications for fluids and components, and guides users through everything from routine servicing to complex component replacement, ensuring the longevity and optimal performance of these vehicles.