The Mazda 6, introduced for the 2003 model year, represents the first generation (GG/GY) of Mazda's mid-size offering, available as a sedan, hatchback, or wagon. Built on a shared platform, this vehicle was designed with a philosophy emphasizing sporty handling, attractive styling, and a strong connection between the driver and the road. It competed in a segment with notable rivals like the Honda Accord and Toyota Camry, often praised for its value for money and European-inspired design. The Mazda 6 offered a choice between a 160-horsepower 2.3L inline-4 engine and a more potent 220-horsepower 3.0L V6 engine, paired with either a 5-speed manual or a 4-speed automatic transmission. Safety features included standard Anti-lock Braking System (ABS) and available options like traction control and Dynamic Stability Control, along with front and optional side/curtain airbags. This comprehensive factory service manual is designed to be an indispensable resource for maintaining and repairing the Mazda 6. It covers a wide range of systems, including powertrain, transmission and drivetrain, suspension and steering, brakes, electrical and electronics, HVAC, and body/chassis components. Detailed procedures are provided for routine maintenance, such as oil changes and filter replacements, as well as more in-depth repair and overhaul tasks for engines, transmissions, and various vehicle systems. The manual also offers guidance on diagnostics and troubleshooting, including the interpretation of diagnostic trouble codes. With an estimated 2000-3000 pages, this English-language digital manual provides extensive technical information to assist owners, mechanics, and technicians in keeping their Mazda 6 in optimal condition.