Generation:
First Generation
Chassis Codes:
S102A, S124A, S132A, S133A (coupe/sedan), S135A (wagon)
Engine Codes:
12A (pre-facelift), 13B (facelift/later models)
Segment:
Compact sports coupe/sedan/wagon
Target Audience:
Enthusiasts, DIY mechanics, restoration specialists
Key Competitors:
Toyota Corolla Levin/Sprinter Trueno, Datsun Sunny/B210, Honda Civic
Unique Selling Proposition:
Rotary engine, sporty styling, lightweight chassis, driver-focused handling.
Historical Significance:
Established Mazda's reputation for performance and rotary engine technology.
Powertrain:
Rotary engine (12A, 13B) theory of operation, disassembly, assembly, lubrication, cooling, fuel injection/carburetion, ignition, exhaust.
Transmission:
Manual transmission (4-speed, 5-speed), clutch system, drive shafts, rear axle.
Chassis And Suspension:
Front suspension (independent, MacPherson struts), rear suspension (leaf springs, solid axle), steering system, brakes (front discs, rear drums).
Electrical System:
Wiring diagrams, battery, charging system (alternator), starting system, lighting, instruments, accessories, engine control unit (ECU) basics.
Body And Interior:
Body panel removal/installation, door mechanisms, glass, upholstery, dashboard components.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug replacement, coolant flush, brake fluid change, general inspections.
Repair:
Engine rebuilding, transmission overhaul, brake caliper/master cylinder repair, suspension component replacement, electrical component diagnostics and repair.
Troubleshooting:
Diagnostic charts for common symptoms, fault finding procedures for engine, transmission, electrical, and braking systems.
Diagnostics:
Detailed diagnostic procedures, component testing, specifications for electrical circuits and mechanical tolerances.
Rebuild Specifications:
Complete engine and transmission disassembly/assembly procedures with torque specifications, clearances, and component measurements.
File Quality:
High-resolution scans of original factory documentation, ensuring clarity of diagrams and text.
Searchability:
Likely text-searchable if converted to PDF with OCR, allowing for quick access to specific information.
Printability:
Designed for printing key sections or the entire manual for workshop use.
Original Binding:
Likely perfect-bound or spiral-bound for original factory manuals.
Original Paper:
High-quality, durable paper suitable for workshop environments.
Engine Type:
Mazda Rotary (Wankel) Engine
Engine Displacement 12A:
1.16 L (67 cu in)
Engine Displacement 13B:
1.30 L (79 cu in)
Horsepower 12A:
Approx. 90-100 hp (varies by market and emission controls)
Horsepower 13B:
Approx. 110-130 hp (varies by market and emission controls)
Torque 12A:
Approx. 90-100 lb-ft
Torque 13B:
Approx. 115-125 lb-ft
Fuel Delivery Early:
Downdraft Carburetor (e.g., Hitachi SH220 or similar)
Fuel Delivery Late:
Fuel Injection (early electronic or mechanical systems)
Fuel Type:
Unleaded Gasoline (87 octane or higher recommended)
Ignition System:
Distributor-based, points or electronic ignition
Apex Seals:
Crucial wear item, requires specific lubrication and handling.
Oil Metering:
Separate oil injection system for apex seals and side seals.
Wheelbase:
Approx. 97.4 inches (2475 mm)
Length:
Approx. 165.7 inches (4209 mm)
Width:
Approx. 63.9 inches (1623 mm)
Height:
Approx. 52.0 inches (1321 mm) (Coupe)
Curb Weight:
Approx. 2100-2400 lbs (950-1090 kg)
Standard Tire Size:
165/80 R13 (early), 175/70 R13 (later)
Crash Test Data:
Limited official crash test data available from this era. Vehicle designed with crumple zones typical for the time.
Brakes:
Front disc brakes, Rear drum brakes. Power assisted optional on some models.
Seatbelts:
Lap belts standard, shoulder belts optional or mandated later in the production run.
Construction:
Unibody construction with integrated safety cage elements.
Oil Change:
Every 3,000 miles (5,000 km) or 6 months, whichever comes first.
Air Filter:
Inspect every 6,000 miles (10,000 km), replace as needed.
Spark Plugs:
Replace every 12,000-18,000 miles (20,000-30,000 km) for standard plugs.
Coolant Flush:
Every 24,000 miles (40,000 km) or 2 years.
Engine Oil:
API SF/SG, SAE 10W-30 or 10W-40 recommended. Rotary specific oil additive may be beneficial.
Coolant:
Ethylene Glycol based antifreeze (50/50 mix with distilled water). Capacity approx. 5-6 quarts.
Brake Fluid:
DOT 3 or DOT 4.
Rotary Engine Apex Seals:
Wear leading to compression loss, hard starting, and rough running. Requires proper maintenance and oiling.
Carburetor:
Gumming, wear, and tuning issues common with age; rebuilding or replacement may be necessary.
Electrical System:
Corrosion in connectors, failing grounds, aging wiring harnesses.
Rust And Corrosion:
Common in wheel wells, rocker panels, and floor pans due to age and climate exposure.
Rotary Pioneering:
Mazda's commitment to the Wankel rotary engine, starting with the Cosmo.
Introduction Year:
1971 (Japan), 1972 (North America)
Body Styles:
Coupe, Sedan, Station Wagon (less common)
Facelift:
Minor styling updates, engine upgrades (13B), and improved interior in later years (around 1975).
Production Period:
1971-1978
Manufacturing Location:
Japan
