The Mazda 121, specifically the DA (DB) generation produced from 1990 to 1998, represents a practical and economical subcompact hatchback. Designed with efficiency and everyday usability in mind, this model aimed to provide reliable transportation for individuals and small families, often competing with vehicles like the Ford Fiesta and Volkswagen Polo. Its engineering emphasizes Mazda's commitment to delivering engaging driving dynamics, or "Zoom-Zoom," even within the constraints of its class. This generation, known in some markets as the Autozam Revue, was primarily manufactured in Japan and offered a straightforward yet capable package, typically featuring a 1.3-liter inline 4-cylinder engine coupled with either a 5-speed manual or an optional 4-speed automatic transmission. This comprehensive Workshop Service Manual for Repair provides essential guidance for maintaining and repairing the Mazda 121 (DB) generation. Covering a wide array of systems, including the engine, fuel, cooling, lubrication, ignition, exhaust, transmission, drivetrain, suspension, steering, brakes, and electrical systems, this manual is an invaluable resource. It details periodic maintenance schedules, fluid specifications, and common issues such as rust and engine idling problems, offering systematic troubleshooting procedures and step-by-step repair instructions. With 771 pages of detailed information, including technical specifications, torque values, special tool requirements, and clear diagrams, this English-language manual is designed to assist owners, mechanics, and technicians in ensuring the longevity and optimal performance of their vehicle.