The 1975 Mazda RX-3 (RX3), chassis code S124A, represents a significant offering in the compact sports car segment of its era. Powered by the distinctive 12A rotary engine, this model competed with other sporty compacts by providing a unique driving experience and performance characteristic of Mazda's pioneering rotary technology. Available in coupe, sedan, and hardtop body styles, the RX-3 was celebrated for its compact rear-wheel-drive chassis and sporty aesthetics, making it a cult classic among enthusiasts. Its engineering quality and reliability, coupled with the appeal of its innovative Wankel engine, cemented its place in automotive history and continues to attract admirers. This comprehensive factory service repair workshop manual in English provides in-depth coverage for all systems, components, and procedures for the 1975 Mazda RX-3. It details everything from general information, engine mechanics including its rotary heart, lubrication, cooling, fuel, and emission control systems, to the electrical system, clutch, transmissions (manual and automatic), axles, steering, brakes, suspension, body, and climate control. The manual includes step-by-step repair instructions, disassembly and reassembly procedures, troubleshooting guides, diagnostic information, and maintenance schedules, making it an invaluable resource for owners, mechanics, and technicians seeking to maintain and repair this iconic vehicle. 🏷️ Basic Information Identification Make: Mazda Model: RX-3 (RX3) Year: 1975 Codes Chassis Code: S124A Engine Code: 12A (Rotary) 👋 Introduction Market Position Market Position: The Mazda RX-3 was a compact sports car that offered performance and unique rotary engine technology, appealing to enthusiasts seeking an alternative to conventional piston engines. This manual targets owners and mechanics who want to maintain and repair this specific model. Competitive Analysis Competitive Analysis: Competed against other sporty compacts of the era, such as the Toyota Corolla Levin/Sprinter Trueno, Datsun 1200/Sunny, and Ford Escort. Its distinct rotary engine provided a unique selling proposition and driving experience. Key Features Key Features: Focus on the iconic Wankel rotary engine, compact RWD chassis, sporty styling, and the comprehensive nature of the service manual for DIY repairs and professional maintenance. Target Audience Target Audience: Enthusiast owners, independent repair shops, and mechanics specializing in rotary engines or vintage Japanese vehicles. 📋 Manual Details Coverage Areas Coverage Areas: All systems, components, and procedures for the 1975 Mazda RX-3 RX3 Page Count Page Count: Not explicitly stated, but implied to be comprehensive based on content list Manual Type Manual Type: Factory Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Systems Covered: General Information, Engine, Lubrication System, Cooling System, Fuel and Emission Control System, Engine Electrical System, Clutch, Manual Transmission, Automatic Transmission, Electronically-Controlled Systems, Propeller Shaft, Front & Rear Axle, Steering System, Braking System, Wheels & Tires, Suspension, Body, Body Electrical System, Heating & Air Conditioning Systems Engine Electrical System Details: Ignition system (distributor, coils, spark plugs), charging system (alternator, regulator), starting system (starter motor, solenoid), wiring diagrams, lighting, gauges, switches. Fuel And Emission Control System Details: Fuel tank, fuel pump, fuel lines, carburetor operation and adjustment, emission control devices (e.g., air injection, EGR if equipped). Braking System Details: Front disc brakes, rear drum brakes, master cylinder, brake lines, parking brake mechanism, troubleshooting, pad/shoe replacement, caliper/wheel cylinder overhaul. Suspension Details: Front independent suspension (struts, control arms), rear leaf springs (depending on body style), shock absorbers, bushings, alignment specifications. Steering System Details: Steering gearbox, steering column, tie rods, steering wheel, power steering components (if equipped), alignment procedures. Procedures Included Procedures Included: Step-by-step repair instructions, complete disassembly and reassembly, troubleshooting, diagnostics, maintenance, adjustments, removal and installation of components Engine Rebuilding Procedures: Detailed steps for rotary engine apex seal replacement, rotor housing inspection, bearing replacement, and complete engine assembly. Transmission Repair Procedures: Manual and automatic transmission disassembly, inspection, repair, and reassembly. Technical Depth Technical Depth: Comprehensive; suitable for both do-it-yourselfers and experienced mechanics, with detailed diagrams and exploded views for accurate work Diagnostic Information: Troubleshooting guides, fault diagnosis charts, common problem identification, and solutions. Manual Type Manual Scope: Comprehensive factory service repair manual 📊 Manual Specifications File Format File Format: PDF Searchability: Likely searchable PDF text, enabling quick access to specific information. Printability: All pages are printable, allowing for physical copies in a workshop environment. Print Quality Print Quality: High quality diagrams and text Binding Type Binding Type: Digital (Downloadable PDF) Paper Type Paper Type: N/A (Digital) Compatibility Compatibility: All Versions of Windows & Mac Requirements Requirements: Adobe PDF Reader & WinZip ⚙️ Engine Specifications Primary Engine Engine Type: Rotary (Wankel) Engine Code: 12A Displacement: Approx. 1146 cc (2 x 573 cc rotors) Rotor Housing Material: Often chrome-plated aluminum or cast iron, depending on specific 12A variant. Performance Horsepower: Approx. 100-110 hp (depending on specific market and emission controls) Torque: Approx. 100-110 lb-ft (depending on specific market and emission controls) Fuel System Fuel System: Carburetor (e.g., Hitachi, Solex) Carburetor Model Examples: Hitachi DC-27A, Solex twin-choke. Lubrication System Oil Type Specification: API SE,...