This manual covers the Mazda 121, produced for the 1990-1991 model years, belonging to the DA generation. This subcompact hatchback is recognized for its affordability and fuel efficiency, often sharing platforms with Ford models in various international markets. The Mazda 121 typically features inline-four petrol engines, such as the 1.1L (B1) or 1.3L (B3) variants, with power outputs around 60-75 horsepower for the 1.3L. It was commonly equipped with a 5-speed manual transmission, with automatic options also available. Known for Mazda's heritage of building durable vehicles, the 121 was a practical choice for everyday transportation. This comprehensive factory service repair manual provides detailed workshop service and repair information for the Mazda 121. It covers a vast array of systems including engine overhaul, transmission service, brake systems, electrical systems, suspension, steering, cooling, fuel, and emission controls. The manual includes step-by-step repair procedures, diagnostic charts, technical data such as torque values and clearances, and electrical wiring diagrams. It is designed to assist technicians, mechanics, and car owners in maintaining and repairing the vehicle effectively, offering factory-level detail for accurate service. 🏷️ Basic Information Identification Make: Mazda Model: 121 Year: 1990-1991 Generation Generation Code: DA 👋 Introduction Market Position Target Audience: Technicians, mechanics, and car owners seeking detailed repair and maintenance information Vehicle Segment: Subcompact hatchback, known for its affordability and fuel efficiency. Competitive Analysis Advantage: Low price, great quality, instant download access, comprehensive coverage Key Features Features: Official factory manual, hundreds/thousands of printable pages, diagrams, electrical schematics, troubleshooting guides 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Page Count Estimated Pages: High (hundreds or thousands) Manual Type Type: Factory Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Service Repair: Detailed engine overhaul, diagnostics, and repair procedures Transmission Service Repair: Manual and automatic transmission service, repair, and overhaul Brake System: Front and rear brake systems, including discs, drums, hydraulic lines, and ABS (if applicable) Wiring Diagram: Comprehensive electrical wiring diagrams for all vehicle systems Electrical System: Detailed coverage of starting, charging, lighting, ignition, and accessory systems Suspension: Front and rear suspension components, alignment, and repair procedures Steering: Power steering system, steering rack, and linkage repair Cooling System: Radiator, thermostat, water pump, and coolant flow diagnostics Fuel Injection: Fuel injection system components, diagnostics, and calibration Fuel System: Fuel pump, tank, lines, and filter service Emission System: Emissions control devices, diagnosis, and repair Heater Air Conditional: HVAC system diagnosis and repair, including refrigerant servicing Engine Control System: ECU, sensors, actuators, and diagnostic trouble codes (DTCs) Chassis Body: Body structure, panels, doors, and chassis components Restraint System: Seat belts, airbags (if applicable), and associated systems Interior: Interior trim, seats, dashboard, and console removal/installation Differential Drive: Front-wheel drive axle and differential service Axle: Front axle and drive shaft components General Maintenance: Routine checks, fluid changes, filter replacements, and adjustments Troubleshooting: Diagnostic charts and procedures for identifying and resolving common faults Periodic Lubrication: Lubrication points and recommended service intervals Exhaust System: Component identification, inspection, and replacement of exhaust pipes, muffler, and catalytic converter. Wheels Tires: Tire rotation, balancing, inspection, and wheel mounting procedures. Bolt pattern: 4x100mm. Lighting System: Headlights, taillights, interior lighting, bulb replacement, and circuit diagnostics. Engine Control Module: ECM/ECU functions, sensor inputs (MAP, TPS, O2), actuator outputs (injectors, ignition coils), and diagnostic procedures. Procedures Included Diagnostic Procedures: System-specific diagnostic trees, symptom-based troubleshooting Repair Procedures: Step-by-step instructions for component removal, repair, and reinstallation Maintenance Procedures: Scheduled maintenance tasks and roadside checks Technical Data: Specifications, torque values, clearances, and tolerances Engine Overhaul: Complete engine teardown, cleaning, inspection, measurement, and reassembly with specifications. Brake Bleeding: Detailed procedures for bleeding the hydraulic brake system. Diagnostics Troubleshooting Charts: Flowcharts and tables to systematically diagnose problems based on symptoms. Ignition System Repair: Ignition timing adjustment, distributor service, spark plug replacement, ignition coil testing. Wheel Alignment Specs: Camber, caster, toe-in specifications for front and rear axles. Technical Depth Depth: Comprehensive factory-level detail suitable for professional technicians and advanced DIY users Diagnostic Tools: Mentions specific diagnostic tools or procedures, e.g., timing light, multimeter usage, sometimes basic scan tool references for EFI models. 📊 Manual Specifications File Format Compatibility: All Versions of Windows & Mac Searchability: PDF files are typically searchable, allowing quick access to specific terms. Print Quality Quality: Great Quality, Printable Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) Requirements Software Requirements: Adobe PDF Reader & WinZip (for larger files) ⚙️ Engine Specifications Primary Engine Engine Options: Likely includes 1.1L (B1) and 1.3L (B3) inline-four petrol engines common to this generation. Performance Horsepower Torque: Specific figures vary by engine and market, but expect around 60-75 HP for the 1.3L variant. Exact data would be in the manual. Fuel System Fuel Delivery: Likely a mix of carbureted and early fuel injection (Electronic Fuel Injection - EFI) systems depending on...