This manual covers the Mazda 121, specifically the DA (1st Generation) models produced between 1988 and 1991, identified by chassis codes DA1 and DA3. As an entry-level subcompact car, the Mazda 121 of this era is recognized for its economical operation and practicality, often sharing its platform with the Ford Festiva. It features a reliable inline 4-cylinder engine with a displacement of 1.1 liters, typically paired with either a 5-speed manual or a 3-speed automatic transmission. The vehicle is equipped with standard front disc and rear drum brakes, and rack and pinion steering, prioritizing essential functionality for urban commuting and daily use. This comprehensive workshop repair service manual in English provides detailed guidance for professional mechanical technicians and experienced DIY enthusiasts. It covers a wide array of systems, including in-depth engine repair, transmission overhaul, drivetrain, suspension, brakes, steering, and electrical systems, along with bodywork and HVAC. The manual includes routine maintenance procedures, troubleshooting diagnostics, and step-by-step repair and overhaul instructions for components. It also identifies special tools required for specific tasks and emphasizes the importance of safety precautions during all procedures, enabling owners to maintain their Mazda 121 effectively and ensure quality service. 🏷️ Basic Information Identification Make: Mazda Model: 121 Generation: DA (1st Generation) Production Years Covered By Manual: 1988, 1989, 1990, 1991 Codes Chassis Codes: DA1, DA3 👋 Introduction Market Position Target Audience: Professional mechanical technicians, experienced DIY enthusiasts. Competitive Analysis Advantage: Provides dealership-level information and procedures, enabling quality service and informed repairs. Key Features Value Proposition: Enables owners to get the best value from their Mazda 121 by facilitating informed maintenance and repairs. Safety Emphasis: Highlights the importance of using safety equipment and observing precautions during repairs. Clarity Indicators: Emphasizes information using WARNING, CAUTION, and NOTE symbols. 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive workshop and repair service Page Count Estimated Page Count: Varies (typically 500-1000+ pages for a full workshop manual) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Engine: Detailed repair, overhaul, diagnostics, tune-ups, lubrication system, cooling system, fuel system, ignition system, emissions control. Transmission: Removal, installation, overhaul, diagnostics for both manual and automatic transmissions. Drivetrain: Front-wheel drive system, axles, CV joints, differential. Suspension: Front and rear suspension systems, shock absorbers, springs, control arms, steering linkage. Brakes: Hydraulic system, master cylinder, brake calipers, wheel cylinders, brake pads/shoes, parking brake, bleeding procedures. Steering: Steering column, steering rack/box, power steering system (if equipped), wheel alignment. Electrical: Wiring diagrams, battery, charging system (alternator, regulator), starting system, lighting, gauges, accessories, fuse box, relays, starter motor, ignition switch. Body: Body panel removal/installation, doors, windows, interior trim, body seals, underbody protection, basic body repairs. HVAC: Heating, ventilation, and air conditioning system diagnosis and repair (if applicable). Emissions: Emissions control systems, catalytic converter, oxygen sensors, evaporative emission control system. Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt adjustments/replacement. Troubleshooting: Diagnostic procedures for common and complex issues across all systems. Repair: Detailed step-by-step repair procedures for component removal, disassembly, repair, reassembly, and installation. Overhaul: Comprehensive overhaul procedures for major components like engines and transmissions. Installation: Procedures for installing new or rebuilt components. Calibration: Procedures for calibrating sensors and systems where applicable. Technical Depth Depth: Advanced diagnostics, complete engine and transmission rebuilds, detailed electrical system troubleshooting, specialized procedures. Component Level Detail: In-depth information on individual components, including their function, testing, and repair. Proprietary Components: Includes instructions for proprietary components and references manufacturer instructions for these parts. Special Tools: Identifies and illustrates Mazda special tool numbers required for specific adjustments or repairs. 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Yes (printable) Binding Type Binding: N/A (Digital File) Paper Type Paper Type: N/A (Digital File) Delivery Method Delivery: Fast and Free Electronic Delivery via Email Content Notes Accuracy Statement: Endeavored to ensure accuracy; considered complete for all required repairs. ⚙️ Engine Specifications Primary Engine Engine Codes: E1, E1-F (commonly found in this generation) Engine Type: Inline 4-cylinder, SOHC, 8-valve Displacement: 1.1L (1138 cc) Bore X Stroke: 70.0 mm x 73.0 mm (typical) Compression Ratio: 8.5:1 to 9.0:1 (typical, depending on variant) Performance Horsepower: Approx. 54-60 PS (40-44 kW) at 5500-6000 rpm Torque: Approx. 82-86 Nm (60-63 lb-ft) at 3000-3500 rpm Fuel System Fuel Delivery: Carburetor (e.g., single-barrel or two-barrel, depending on market and trim) Fuel Type: Unleaded Gasoline Recommended Octane: 91 RON (research octane number) or equivalent 🔧 Transmission Standard Type: 5-speed manual transmission Optional Type: 3-speed automatic transmission Features Clutch: Single dry plate, hydraulically operated 📐 Dimensions Exterior Length: Approx. 3,730 mm (146.9 in) Width: Approx. 1,570 mm (61.8 in) Height: Approx. 1,365 mm (53.7 in) Wheelbase: Approx. 2,300 mm (90.6 in) Weights Curb Weight: Approx. 780-850 kg (1719-1874 lbs) Gross Vehicle Weight Rating Gvwr: Approx. 1200-1300 kg (2646-2866 lbs)...