The Mazda 3, first generation (BK), produced from 2003 to 2007, represents Mazda's commitment to engaging driving dynamics and stylish, practical design. Available as a 4-door sedan or 5-door hatchback, this compact car offered a choice of efficient MZR engines, including a 2.0L and a more powerful 2.3L variant, paired with either a manual or automatic transmission. Its 'Zoom-Zoom' philosophy was evident in its responsive handling and sporty aesthetics, positioning it as a compelling option against key competitors in its segment. Safety was a strong suit, with many configurations earning top ratings in frontal crash tests and featuring standard anti-lock brakes and electronic brake-force distribution. This comprehensive factory service manual provides in-depth guidance for maintaining and repairing the Mazda 3 BK. It covers all major systems, including the powertrain, chassis, and electrical components, detailing everything from routine maintenance procedures like oil changes and filter replacements to complex engine and transmission overhauls. The manual includes diagnostic troubleshooting guides, technical specifications, and repair procedures for common issues, making it an essential resource for owners, technicians, and mechanics. With over 3000 pages of information, it offers a complete reference for ensuring the longevity and optimal performance of your Mazda 3.