This workshop service repair manual covers Mazda vehicles equipped with B6-DOHC and BP-DOHC engines. These inline 4-cylinder engines feature DOHC valvetrain configurations and are water-cooled, utilizing fuel injection. The B6 engine has a displacement of approximately 1.6 liters, while the BP engine offers approximately 1.8 liters. This manual provides comprehensive information for maintaining and repairing these engine types. The purpose of this English-language manual is to serve as a definitive guide for all service and repair needs. It includes step-by-step service procedures, detailed maintenance checklists, and complete disassembly and assembly instructions, all supported by hundreds of photos and illustrations. The manual covers electrical systems, tightening torques, servicing specifications, and an advanced troubleshooting guide, ensuring owners and technicians have the necessary resources for optimal vehicle upkeep and performance.