Target Audience:
Owners of the 1975 Mazda RX-3, DIY mechanics, classic car enthusiasts
Value Proposition:
Provides essential, detailed information for immediate repairs and ongoing maintenance, saving significant costs compared to professional servicing.
Usability:
Easy-to-follow, step-by-step instructions suitable for all skill levels.
Accessibility:
Instant download format for immediate access.
Satisfaction Guarantee:
Customer satisfaction guaranteed.
Primary Coverage:
Comprehensive Service and Repair
Secondary Coverage:
Technical Data, Parts Information, Diagrams
Estimated Page Count:
Extensive (specific number not provided, but described as 'most complete')
Type:
Workshop Service Repair Manual
Digital Compatibility:
All Versions of Windows & Mac
Digital Requirements:
Adobe PDF Reader
Printability:
Printable (all pages)
Engine Systems:
Engine, Lubrication System, Cooling System, Fuel and Emission Control System, Engine Electrical System
Drivetrain Systems:
Clutch, Manual Transmission, Automatic Transmission, Electronically-Controlled Transmission (if applicable to specific RX-3 trims of '75), Propeller Shaft, Front & Rear Axle
Chassis Systems:
Steering System, Braking System, Wheels & Tires, Suspension
Body And Electrical:
Body, Body Electrical System, Heating & Air Conditioning Systems
Maintenance Procedures:
Routine checks, fluid changes, filter replacements, tune-ups
Repair Procedures:
Engine overhaul, transmission repair, brake service, suspension component replacement, electrical system troubleshooting
Diagnostic Procedures:
Troubleshooting guides for common and uncommon issues
Installation Procedures:
Installation of specific components and accessories (likely inferred)
Depth:
Comprehensive, suitable for 'Do-It-Yourself' enthusiasts and professional technicians
Detail Level:
Detailed technical data, diagrams, and step-by-step instructions
Part Information:
Complete list of parts and pictures
Engine Type:
Rotary (Wankel)
Engine Displacement Cc:
1146 cc (70.3 cu in) - Equivalent rotor housing displacement. Often referred to as 1.1L or 1.2L
Engine Code:
12A (Rotary)
Horsepower Gross Ps:
Approximately 90-100 PS (Gross) depending on specific market and emissions controls for 1975.
Torque Gross Lb-Ft:
Approximately 100-110 lb-ft (Gross) depending on specific market and emissions controls for 1975.
Carburetion:
Typically twin-barrel carburetor(s).
Fuel Type:
Unleaded Gasoline (as regulations began to mandate)
Body Styles:
Coupe, Sedan, Station Wagon
Wheelbase Mm:
Approx. 2400 mm (94.5 inches)
Length Mm:
Approx. 4150-4350 mm (163.4-171.3 inches) depending on body style
Width Mm:
Approx. 1600-1630 mm (63.0-64.2 inches)
Curb Weight Kg:
Approx. 950-1050 kg (2094-2315 lbs) depending on body style and equipment
Safety Ratings Era:
Safety standards of the mid-1970s. Less stringent than modern standards.
Braking System:
Front Disc Brakes, Rear Drum Brakes
Steering Type:
Recirculating ball steering system.
Seatbelts:
Standard lap and shoulder belts
Body Construction:
Unitary body construction, intended for crash energy absorption relative to the era.
Oil Change Interval Miles:
Typically 3,000-5,000 miles, or as specified in the manual. Rotary engines require specific oil quality and levels.
Spark Plug Replacement Miles:
Varies, but typically around 15,000-20,000 miles for the specific rotary-compatible plugs.
Timing Belt Replacement:
N/A (Rotary engines do not use timing belts; they use chains or direct drive for the rotors).
Engine Oil Type:
API SF or SG classification, SAE 10W-30 or 10W-40 recommended (specific rotary oil requirements should be confirmed in the manual).
Coolant Type:
Ethylene glycol-based antifreeze. Capacity and mixture ratio specified in the manual.
Transmission Fluid Manual:
GL-4 Gear Oil, SAE 75W-90 or 80W-90 (check manual for exact spec).
Transmission Fluid Automatic:
Dexron II or equivalent (check manual for exact spec).
Brake Fluid Type:
DOT 3 or DOT 4.
Apex Seals:
Wear of apex seals is a common concern for all rotary engines, affecting compression and performance over time. Proper lubrication and avoiding over-revving are critical.
Carburetor Tuning:
Carburetors can require periodic adjustment and cleaning due to age and fuel variability.
Cooling System Maintenance:
Regular flushing and inspection of the cooling system is vital for rotary engine longevity.
Electrical Connections:
Corrosion and degradation of electrical connections are common in vehicles of this age.
Brand Focus:
Mazda's pioneering work with rotary engine technology.
Positioning:
The RX-3 was Mazda's sporty compact offering, bridging the gap between the smaller RX-2 and the larger RX-4, showcasing the performance potential of the rotary engine.
Body Style Introduction:
Introduced in 1971, the RX-3 evolved through various updates, with the 1975 model representing a refined iteration.
Production Period:
1971-1978
