The 1991 Mazda 121 (DB) is a compact, economical subcompact car designed for urban driving, competing in the supermini segment. Known for its distinctive wedge-shaped styling and practical interior, this model offered efficient 4-cylinder engines and front-wheel drive, making it a maneuverable and affordable choice. It stood out against competitors with its unique design and respectable handling for its class, embodying Mazda's heritage of innovative compact car engineering.

This comprehensive Factory Service Manual (FSM) provides full service, repair, and diagnostic coverage for all mechanical and electrical systems of the Mazda 121 (DB). It details routine maintenance, component removal and installation, rebuilding procedures, diagnostic trouble codes, electrical circuit diagrams, and torque specifications. This manual is an essential resource for owners, mechanics, and technicians, offering detailed instructions and technical specifications to ensure the proper maintenance and repair of the vehicle.