This manual covers the 2003 BMW 3 Series, specifically the 325i model with the E46 chassis code. Known for its renowned driving dynamics, powerful inline-six engines, and premium interior, the 3 Series is an entry-luxury executive sedan and coupe that has consistently earned accolades for its engineering and performance. This generation, particularly the 2003 model year which received a mid-cycle refresh, represents a significant benchmark in automotive design and driver engagement, offering a blend of sportiness and refinement that appeals to discerning drivers.

This comprehensive factory service and repair manual provides detailed information for maintaining and repairing your 2003 BMW 3 Series 325i. It covers all major systems, including the M54B30 engine, Getrag 420G manual and GM 5L40-E automatic transmissions, drivetrain, suspension, brakes, steering, electrical system, HVAC, and safety features. With over 1500 pages of factory-level detail, this English-language manual offers step-by-step procedures for maintenance, diagnostics, repairs, and rebuilds, along with essential technical specifications and troubleshooting guides, making it an indispensable resource for owners and technicians alike.