🏷️ Basic Information Identification Make: Mazda Model: 121 Year: 1990 Codes Platform Code: DA (First Generation, DB platform for later models) 👋 Introduction Market Position Market Segment: Subcompact hatchback, primarily positioned as an affordable and economical personal transport vehicle. Competitive Analysis Competitors: Ford Fiesta, Opel Corsa (Vauxhall Nova), Volkswagen Polo, Fiat Uno, Peugeot 205, Nissan Micra. Key Features Distinguishing Features: Compact dimensions for urban maneuverability, fuel efficiency, practicality, known for reliability within its class. Target Audience Audience: First-time car buyers, budget-conscious individuals, city dwellers seeking an economical and easy-to-manage vehicle. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Manual for the 1990 Mazda 121 Page Count Estimated Pages: 300-500 (typical for a comprehensive workshop manual of this era) Manual Type Type: Service/Workshop Manual Language Language: English Format Format: Likely printed, or potentially available as a scanned PDF 📖 Manual Coverage Systems Covered Engine: Engine mechanical systems, cylinder head, block, pistons, crankshaft, camshafts, timing system, lubrication, cooling, fuel, ignition, emission control Transmission: Manual and Automatic transmission disassembly, assembly, adjustments, torque specifications, troubleshooting Drivetrain: Clutch, driveshafts, differential, axles, wheel bearings Suspension: Front and rear suspension components, geometry, shock absorbers, springs, bushings, alignment procedures Brakes: Hydraulic brake system, master cylinder, brake lines, calipers, wheel cylinders, brake pads, brake shoes, parking brake, ABS (if equipped) Steering: Steering gear, steering column, power steering system (if equipped), tie rods, steering linkage Electrical: Battery, charging system (alternator, starter), ignition system, lighting system, instrumentation, wiring diagrams, fuses, relays, common electrical fault diagnosis Body: Body panel removal and installation, doors, windows, interior trim, body hardware, rust repair basics HVAC: Heating, ventilation, and air conditioning system components, controls, refrigerant handling (basic) Procedures Included Maintenance: Routine scheduled maintenance, oil changes, filter replacements, spark plug replacement, belt inspection and replacement, brake fluid flush, coolant flush Repair: Engine overhaul, transmission repair, suspension component replacement, brake system repairs, electrical component diagnosis and replacement Troubleshooting: Diagnostic procedures for common drivability issues, electrical faults, starting problems, cooling system issues Adjustments: Valve clearance adjustment, ignition timing adjustment, clutch adjustment, brake adjustment Specifications: Torque specifications, clearances, fluid capacities, diagnostic values Technical Depth Depth: Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts. Covers disassembly, reassembly, diagnosis, and repair procedures. 📊 Manual Specifications File Format File Format: If PDF: Searchable text, high-resolution scans, printable pages. Print Quality Print Quality: If Printed: Clear, legible text and diagrams, durable paper stock. Binding Type Binding Type: If Printed: Spiral-bound or perfect-bound for lay-flat usability in a workshop environment. Paper Type Paper Type: If Printed: Coated or heavy-weight paper to withstand workshop conditions. ⚙️ Engine Specifications Primary Engine Engine Code Variants: B3 (1.3L SOHC I4), E3 (1.1L SOHC I4 - common in some markets) Performance Displacement Liters: 1.3L (1324 cc) for the B3 engine Horsepower Ps: ~63 PS (46 kW) at ~5500 rpm (for B3 engine) Torque Nm: ~103 Nm (76 lb-ft) at ~3000 rpm (for B3 engine) Fuel System Fuel Delivery: Carburetor (e.g., Hitachi DC type) for most 1990 models; Fuel injection (EFI) became more common in later versions or specific markets. Engine Layout Layout: Inline four-cylinder (I4), front-wheel drive Cylinder Head Valvetrain: Single Overhead Camshaft (SOHC) Cooling System Type: Liquid-cooled, pressurized system Lubrication System Oil Type Recommendation: API SG/SH or higher, SAE 10W-30 or 10W-40 (check manual for specific conditions) 🔧 Transmission Standard Type: 5-speed manual transmission Optional Type: 3-speed automatic transmission Features Clutch: Single dry plate diaphragm spring type (manual transmission) Fluid Specification Manual Transmission Fluid: API GL-4, SAE 75W-90 or 80W-90 gear oil (check manual for specific capacity) Automatic Transmission Fluid: Dexron II or equivalent (check manual for specific capacity) 📐 Dimensions Exterior Length Mm: ~3800 mm (varies slightly by market and body style) Width Mm: ~1630 mm Height Mm: ~1370 mm Wheelbase Mm: ~2340 mm Weights Curb Weight Kg: ~800-850 kg (depending on trim and transmission) Gross Vehicle Weight Rating Kg: ~1250 kg (approximate) 🛡️ Safety Features Ratings NHTSA Front Impact: Not rated or not tested under modern standards for this era. Active Features ABS: Optional on some higher trims or later production runs, not standard. Passive Features Seatbelts: Standard front seatbelts, potentially with pre-tensioners on later models. Rear lap belts standard. Headrests: Front seat headrests standard. Construction Body Structure: Unibody construction with crumple zones, though less advanced than modern vehicles. 💡 Technology Features Infotainment Audio System: Basic AM/FM radio with cassette player. Likely single-speaker or optional two-speaker setup. Dashboard Features: Analog gauges for speedometer, tachometer (optional), fuel level, coolant temperature. Warning lights for various systems. Driver Assistance Assist Systems: Limited to basic driver aids like power steering (if optioned). No modern electronic driver assistance systems (e.g., cruise control, traction control) were standard or widely available. 🔧 Maintenance Service Intervals Oil Change Interval Km: Every 5,000 - 7,500 km or 6 months, whichever comes first (verify with manual). Air Filter Replacement Km: Every 20,000 - 30,000 km or...