The Mazda RX3, produced from 1971 to 1978, stands as a distinctive entry in the compact car segment, renowned for its innovative Wankel rotary engine. Available in 2-door coupe, 4-door sedan, and 5-door wagon body styles, and identified by chassis codes AP, AG, and AH respectively, the RX3 offered a sporty driving experience and stylish Japanese design. Its unique selling proposition was the compact and high-revving 12A rotary engine, which provided smooth operation and a performance-oriented character, setting it apart from competitors like the Datsun 510 and early Toyota Corollas. This vehicle appealed to enthusiasts seeking a unique engineering approach and dynamic handling. This comprehensive service and repair manual provides in-depth information for the Mazda RX3, covering all major systems. It details maintenance procedures, including fluid changes, filter replacements, and ignition timing, alongside repair instructions for the rotary engine, transmissions, suspension, brakes, and electrical systems. Troubleshooting guides, diagnostic procedures, and specific adjustment techniques are also included to assist owners and technicians. The manual features factory-level technical specifications, torque values, wiring diagrams, and information on special tools required, ensuring accurate maintenance and repair for the first generation RX3 variants. 🏷️ Basic Information Identification Make: Mazda Model: RX3 Model Generations Covered: First Generation (Savy/Custom/Super Deluxe/GSL variants) Model Years Covered: 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978 Codes Chassis Codes: AP (sedan), AG (coupe), AH (wagon) 👋 Introduction Market Position Vehicle Segment: Compact/Subcompact car, Sporty Coupe/Sedan/Wagon Target Demographic: Enthusiasts, performance-oriented buyers, individuals seeking distinctive Japanese engineering. Competitive Analysis Key Competitors Era: Datsun 510, Toyota Corolla, Honda Civic (early generations), various European compacts. Unique Selling Proposition: Innovative Wankel rotary engine, sporty handling, stylish Japanese design. Key Features Engine Technology: Wankel Rotary (12A), known for smooth operation, high RPM capability, and compact size. Design Aesthetics: Clean, sporty lines, popular in coupe and sedan body styles. Performance Orientation: Designed with handling and a sporting character in mind, often a popular choice for modification. 📋 Manual Details Coverage Areas Coverage Overview: Comprehensive service and repair information for all systems of the Mazda RX3 from 1970-1978. Engine Coverage: Rotary Engine (12A), including maintenance, disassembly, reassembly, troubleshooting, and tuning. Transmission Coverage: Manual and Automatic transmissions, including overhaul, clutch service, and driveline components. Chassis Suspension Steering Coverage: Front and rear suspension, steering system, wheel alignment specifications, and component replacement. Brake System Coverage: Front disc brakes, rear drum brakes, hydraulic system, parking brake, and troubleshooting. Electrical System Coverage: Complete wiring diagrams, component testing, charging system, ignition system, lighting, and accessories. Body And Interior Coverage: Body panel repair, interior trim, door mechanisms, glass replacement, and weatherstripping. Cooling And Heating Coverage: Radiator, water pump, heater core, and HVAC system components. Fuel System Coverage: Carburetor(s) (e.g., Hitachi, Mikuni), fuel pump, fuel lines, and tank service. Exhaust System Coverage: Exhaust manifold, pipes, muffler, and catalytic converter (where applicable). Page Count Estimated Page Count: 500+ Manual Type Manual Classification: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Mechanical Systems: Engine (Rotary 12A), Transmission (Manual/Auto), Drivetrain, Suspension, Steering, Brakes, Fuel, Cooling, Exhaust. Electrical Systems: Ignition, Charging, Starting, Lighting, Gauges, Accessories, Wiring Harnesses. Body And Chassis: Body Panels, Chassis Components, Interior Trim, Glass, Doors, Locks, Seats. Procedures Included Maintenance Procedures: Scheduled maintenance (oil changes, filter replacements, spark plug gap/replacement, fluid checks), ignition timing adjustment, carburetor adjustments. Repair Procedures: Engine rebuild (apex seals, rotor housing inspection, eccentric shaft), transmission overhaul, brake caliper/wheel cylinder service, suspension component replacement, steering rack service. Diagnostic Procedures: Troubleshooting guides for common problems, electrical system diagnostics using multimeters, rotary engine specific diagnostics (compression, lubrication). Adjustment Procedures: Carburetor jetting and float level, ignition timing, idle speed, clutch pedal adjustment, parking brake adjustment. Technical Depth Depth Of Information: Factory-level technical specifications, detailed disassembly and reassembly instructions with torque values, schematics, and diagnostic flowcharts. Special Tool Requirements: Identifies specific tools required for certain procedures, particularly for rotary engine internal work. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content Printability: Printable pages Print Quality Image Resolution: High-resolution scans of original factory diagrams and photographs Binding Type Binding Format Description: Digital PDF download, no physical binding. Paper Type Paper Type Description: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Wankel Rotary Engine Code: 12A Displacement: 1146 cc (effectively, though often compared to larger piston engines) Rotor Housing Design: Two-rotor, single apex seal per rotor Performance Horsepower Range: Approx. 90-105 HP (depending on market and emissions controls) Torque Range: Approx. 100-110 lb-ft Redline: Approx. 6000-7000 RPM Fuel System Carburetion: Single or Twin Hitachi downdraft carburetors (e.g., SU-type, or other twin choke models) Fuel Type: Unleaded gasoline (from later years, earlier may have used leaded) Fuel Pump Type: Mechanical, engine-driven 🔧 Transmission Standard Standard Transmission Type: 4-speed Manual Optional Optional Transmission Type: 3-speed Automatic (likely a Toyo Kogyo or similar) Features Clutch Type: Single...