🏷️ Basic Information Identification Make: Mazda Model: 121 Year: 1990 Codes Chassis Code: DA Engine Code: B3 (1.3L) 👋 Introduction Market Position Segment: Subcompact hatchback, known for its affordability, fuel efficiency, and practicality. Competitive Analysis Key Competitors 1990: Ford Festiva, Honda Civic, Toyota Tercel, Nissan Sentra, Suzuki Swift. Key Features Design Philosophy: Compact, fuel-efficient, reliable transportation. Often praised for its surprisingly spacious interior for its size. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: Digital (likely PDF) Page Count Estimated Page Count: Approx. 800-1200 pages (typical for comprehensive workshop manuals of this era) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, inspection, repair, timing belt, cylinder head, pistons, crankshaft, camshaft, lubrication system, cooling system. Fuel System: Fuel pump, injectors, fuel filter, fuel tank, fuel lines, carburetor (if applicable, though likely EFI for 1990). Ignition System: Distributor, ignition coils, spark plugs, wiring, ignition timing. Exhaust System: Exhaust manifold, catalytic converter, muffler, pipes, emissions control. Transmission Manual: Gearbox assembly, disassembly, clutch, shifting mechanism, gear ratios, maintenance, repair. Transmission Automatic: Automatic transmission operation, overhaul, fluid types, control systems (if applicable). Drivetrain: Front-wheel drive system, driveshafts, CV joints, differential. Suspension Front: MacPherson struts, control arms, ball joints, bushings, wheel bearings, alignment specifications. Suspension Rear: Torsion beam axle, shock absorbers, springs, bushings, alignment specifications. Steering System: Steering rack, tie rods, power steering pump (if applicable), steering column, maintenance, repair. Brake System: Front disc brakes, rear drum brakes (typical for this model), hydraulic system, master cylinder, brake lines, calipers, wheel cylinders, parking brake. Electrical System Charging: Alternator, battery, voltage regulator, wiring diagrams. Electrical System Starting: Starter motor, starter solenoid, ignition switch, wiring diagrams. Lighting System: Headlights, taillights, interior lights, turn signals, wiring diagrams. Instrument Panel: Gauges, warning lights, switches, wiring diagrams. Body Interior: Trim removal and installation, seat adjustment, dashboard components, door panels, headliner. Body Exterior: Bumpers, fenders, hood, trunk lid, doors, glass, seals, body panel removal and installation. HVAC System: Heating, ventilation, air conditioning (A/C) system components, refrigerant, operation, repair. Wiring Diagrams: Comprehensive electrical wiring schematics for all systems. Procedures Included Preventative Maintenance: Oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake inspection. Troubleshooting: Diagnostic flowcharts, symptom-based troubleshooting guides, common fault diagnosis. Engine Repair: Complete engine rebuild procedures, head gasket replacement, piston ring replacement, bearing replacement. Transmission Overhaul: Detailed steps for disassembling and reassembling manual and automatic transmissions. Brake Service: Brake pad replacement, rotor resurfacing/replacement, brake caliper rebuilding, brake bleeding. Suspension Component Replacement: Strut replacement, shock absorber replacement, control arm bushings, ball joint replacement. Electrical Component Diagnosis: Testing of sensors, actuators, fuses, relays, and control modules. Body Panel Repair: Alignment and replacement of doors, fenders, hood, and trunk. HVAC Repair: A/C compressor replacement, refrigerant recharging, heater core replacement. Timing Belt Replacement: Critical procedure for B3 engine, including tensioner and water pump recommendations. Technical Depth Depth: Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Covers everything from routine maintenance to complete engine and transmission overhauls. 📊 Manual Specifications File Format File Type: Likely PDF, potentially scanned images of original pages. Searchable text is a bonus. Print Quality Image Resolution: Variable, depending on the source of the digital conversion. Aim for clear, legible scans. Binding Type Original Binding: Likely perfect bound or spiral bound for professional workshop manuals. Paper Type Original Paper Quality: Durable, often glossy paper to withstand shop conditions. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, SOHC (Single Overhead Camshaft) Displacement: 1.3 Liters (1324 cc) Bore X Stroke: 71.0 mm x 83.6 mm (typical for B3) Compression Ratio: 9.3:1 (typical) Performance Horsepower: Approx. 62-70 hp @ 5500-6000 rpm (depending on market and tune) Torque: Approx. 70-78 lb-ft @ 3000-3500 rpm (depending on market and tune) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Recommended Fuel: Unleaded gasoline, 87 octane (or as per local market specifications) Maintenance Spark Plugs: NGK BKR5E-11 or equivalent (check manual for exact part number) Timing Belt Replacement Interval: 60,000 miles or 5 years (critical, non-interference engine not guaranteed) 🔧 Transmission Standard Type: 5-speed Manual Transmission Optional Type: 3-speed Automatic Transmission Features Manual Gear Ratios: Specific ratios provided in manual (e.g., 1st: 3.583, 2nd: 2.000, 3rd: 1.367, 4th: 1.000, 5th: 0.821, Reverse: 3.583) Maintenance Manual Transmission Fluid Type: API GL-4, SAE 75W-90 (or specific Mazda recommendation) Automatic Transmission Fluid Type: Dexron II or equivalent 📐 Dimensions Exterior Length: Approx. 3755 mm (147.8 inches) Width: Approx. 1615 mm (63.6 inches) Height: Approx. 1395 mm (54.9 inches) Wheelbase: Approx. 2310 mm (90.9 inches) Weights Curb Weight: Approx. 800-900 kg (1760-1980 lbs), depending on trim and options Gross Vehicle Weight Rating: Refer to vehicle placard or manual 🛡️ Safety Features Ratings NHTSA Crash Test Results: Data limited for this era and model; early models generally had less stringent testing. Passive Features Seat Belts: 3-point front, 2-point rear (typical) Body Structure: Unibody construction...