This manual covers the Mazda 3, specifically the BL Series (Second Generation) produced between 2008 and 2013. This model is powered by a 2.2-liter Inline-4 (I4) MZR-CD turbocharged diesel engine, known for its blend of fuel economy and torque, offering approximately 150-175 PS and 360-380 Nm of torque. The Mazda 3 is a compact family car, recognized for its sporty handling, refined interior, and adherence to Mazda's 'Jinba Ittai' philosophy, emphasizing a connected driving experience. Available in both hatchback and sedan body styles, this vehicle was designed to compete in the C-segment, offering advanced diesel technology and a focus on driving dynamics. This comprehensive workshop service repair manual is written in English and provides in-depth information for maintaining and repairing the Mazda 3. It details procedures for all major mechanical and electrical systems, including the 2.2L diesel engine, transmissions, brakes, electrical systems, suspension, steering, HVAC, and body components. The manual includes routine maintenance tasks, diagnostic trouble code interpretation, systematic troubleshooting guides, step-by-step repair procedures, and essential technical specifications such as torque values and fluid capacities. Its extensive coverage is intended for professional automotive technicians and experienced DIY mechanics, offering guidance from basic upkeep to complex component overhauls.