The 2004 Mazda6 represents a significant entry into the mid-size sedan and sport wagon market, built on the GG/GY platform. Known for its engaging handling, stylish design, and spacious interior, particularly in the wagon variant, the Mazda6 offers reliable powertrains and a driving experience often associated with Mazda's "Zoom-Zoom" philosophy. This model was recognized with Car and Driver's 10Best List in 2004 and was a contender for MotorTrend's Car of the Year, highlighting its blend of sportiness and practicality. Available with a 2.3L MZR engine producing 160 horsepower and 155 lb-ft of torque, paired with either a 5-speed manual or a 5-speed automatic transmission featuring Sequential Sport Shift, the Mazda6 provides a dynamic and enjoyable driving experience for its class. This comprehensive factory service and repair manual, written in English, provides detailed guidance for the complete service and repair of the 2004 Mazda6. Spanning approximately 3000+ pages, it covers all essential vehicle systems, including engine mechanicals, fuel, ignition, cooling, exhaust, lubrication, transmissions (automatic and manual), drivetrain, suspension, steering, braking systems (including ABS and EBD), and extensive electrical system diagnostics with wiring diagrams. It also details HVAC, body, interior, and safety systems. The manual includes maintenance schedules, repair procedures, diagnostic troubleshooting, and technical specifications such as torque values, fluid capacities, and component data, making it an indispensable resource for owners and technicians alike.