Mazda Cosmo MA (1977–1983)

The MAZDA COSMO Base represents a unique chapter in automotive history. This vehicle wiki provides essential information for owners and enthusiasts, covering everything from routine maintenance to potential problem areas specific to this model.

Parts for the Mazda Cosmo MA

• Radiator Cap (8)
• Oil Filter (7)
• Drive Belt Alternator (6)
• Fuel Filter (4)
• Tie Rod End (3)
• Steering Rack End (3)
• Timing Kit (3)
• Spark Plug (3)
• Oil Seal Crank Shaft Rear / Rear Main Bearing (3)
• Welch / Frost Plug (3)
• Timing Chain Guide (3)
• Wheel Nut (3)
• Oil Seal Transmission/Gearbox Output Rear Extension (2)
• Air Filter (2)
• Valve Cover Gasket (2)
• Wiper Blade (2)
• Sump/Drain Plug (2)
• Oil Cap (2)
• Oil Pressure Switch/Sender (2)
• Wiper Blade Front (2)
• Oil Seal Transmission/Gearbox Front Input (2)
• Engine Oil Pan Gasket (2)
• Exhaust Flange Gasket Pipe (2)
• Distributor Cap (1)
• Contact Set Distributor (1)
• Distributor Condenser (1)
• Automatic Transmission Filter (1)
• Wiper Blade Front & Rear (1)
• Wiper Refill (1)
• Wiper Refill Front (1)
• Wheel Bearing Kit/Hub Front (1)
• Wheel Bearing Grease Front (1)
• Piston Pin Bush (1)
• Brake Pads Front (1)
• Timing Tensioner (1)
• Oil Seal Crank Shaft Front / Timing Front (1)
• Cylinder Head Gasket (1)
• Thermostat Housing Gasket (1)
• Head Set/Valve Regrind Gasket Set (1)
• Conversion Gasket Set (1)
• Seal Ring (1)
• Main Bearing Crank Shaft (1)
• Oil Seal Camshaft End (1)
• Lash Adjuster (1)
• Timing Chain (1)
• Piston Ring (1)
• Oil Seal Hub Front Inner (1)
• Oil Seal Differential Pinion Rear (1)
• Oil Seal Hub Rear Inner (1)
• Oil Seal Hub Rear Outer (1)
• Thermostat (1)
• Drive Belt (1)

Known issues

Common Issues to Watch For
Keep an eye on these potential problem areas, particularly if your COSMO Base has accumulated significant mileage:
• Apex Seals (Rotary Engine): A well-known concern with rotary engines, apex seals can wear over time, leading to reduced compression and performance. Expect to see these issues arise within the 80,000 - 120,000 km range.
• Fuel System: The fuel system can be prone to leaks. Regular inspection of fuel lines and components is recommended.
• Cooling System: Overheating can be a concern, especially in warmer climates. Ensure the cooling system is functioning efficiently to prevent potential engine damage.

WOF tips

WOF (Warrant of Fitness) Considerations
During your COSMO Base's WOF inspections, be prepared for scrutiny of these areas:
• Rear Suspension Bushes: Wear and tear on the rear suspension bushes can affect handling and stability.
• Brake Lines (Corrosion): Corrosion on brake lines is a significant safety concern and a common reason for WOF failures.

About the Mazda Cosmo MA

Heritage & Heart
The MAZDA COSMO, particularly the Base model, is a rare and highly coveted classic. It often finds its home with collectors and those passionate about rotary engine technology. Owning a COSMO Base isn't just about transportation; it's about preserving a piece of automotive innovation.

Standard Fitment Considerations
When maintaining your COSMO Base, consider the standard fitment components crucial for its performance and safety:
• Brakes: Ensuring the braking system is in optimal condition is paramount for a classic vehicle. Regular inspections and maintenance are essential.
• Filters: Maintaining clean filters (air, oil, and fuel) contributes to the overall health and longevity of the engine.
• Suspension: The suspension system plays a vital role in handling and ride comfort. Address any issues promptly to maintain the vehicle's original driving characteristics.

Questions owners ask

What are some common problems I should watch out for on my MAZDA COSMO 1977–1983?

Keep an eye on the apex seals in the rotary engine, as they can wear around 80,000 - 120,000 km, leading to reduced compression. Also, inspect the fuel system regularly for leaks and ensure the cooling system is functioning efficiently to prevent overheating.

Where can I get parts for my MAZDA COSMO 1977–1983 in New Zealand?

CARFIX stocks 99 SKUs for the MAZDA COSMO 1977–1983. We stock parts like brake components, filters (air, oil, and fuel), and suspension components to help keep your classic COSMO Base running smoothly.

What should I check on my MAZDA COSMO 1977–1983 before a WOF inspection?

Pay close attention to the rear suspension bushes, as wear and tear can affect handling. Also, thoroughly inspect the brake lines for any signs of corrosion, as this is a common reason for WOF failures.

How often should I service my MAZDA COSMO 1977–1983?

The recommended service interval for the MAZDA COSMO 1977–1983 is every 5000km. Regular servicing is crucial for maintaining the health of the rotary engine and other vital components.

What kind of maintenance is important for the rotary engine in my MAZDA COSMO 1977–1983?

Maintaining clean air, oil, and fuel filters is crucial for the rotary engine's health. Also, keep a close eye on the apex seals, as they are a known wear item in rotary engines.

Are brake issues common on the MAZDA COSMO 1977–1983 for WOF inspections?

Yes, brake lines are a common WOF failure point due to corrosion. Regular inspection and maintenance of the entire braking system, including brake lines, is essential for safety and WOF compliance.

What should I do if my MAZDA COSMO 1977–1983 is overheating?

Overheating can be a concern, especially in warmer climates. Ensure the cooling system is functioning efficiently. Check the radiator, coolant hoses, thermostat, and water pump for any signs of leaks or damage.