Mazda Efini Ms 9

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The Mazda Efini MS-9: A Comprehensive Guide

The Mazda Efini MS-9, often simply referred to as the MS-9, was a luxury sedan produced by Mazda under its ill-fated Efini brand from 1991 to 1995. Efini was one of Mazda's five marques in Japan, intended to sell luxury vehicles, much like Lexus for Toyota and Acura for Honda. Positioned as the flagship sedan of the Efini lineup, the MS-9 aimed to compete with established luxury cars in the Japanese market. It was essentially a rebadged and slightly restyled Mazda Sentia, offering a more prestigious alternative.

Generations

The MS-9 only had one generation, spanning from 1991 to 1995. While there were minor updates during its production run, the core design and mechanical underpinnings remained consistent.

• First Generation (HD; 1991-1995): Introduced with a focus on luxury and advanced technology. Key features included a distinctive pillarless hardtop design, available electronically adjustable suspension, and a range of V6 engines. Updates during this period primarily involved minor cosmetic changes, interior trim enhancements, and improvements to the available technology.

Reliability & Common Issues

The MS-9, being a rebadged Mazda Sentia, shares many of the same reliability characteristics and potential issues. While generally well-built for its time, its age and the complexity of some of its systems mean potential buyers should be aware of certain problem areas.

Engine Issues:

• Oil Leaks: Common, especially in older examples. Check around the valve covers, oil pan, and rear main seal. Addressing these promptly is crucial to prevent more serious engine damage.
• Cooling System Problems: The aluminum radiator and plastic coolant tanks are prone to cracking and leaks. Overheating can lead to head gasket failure, so a thorough inspection of the cooling system is essential. Consider replacing older hoses and the radiator as preventative maintenance.
• V6 Engine Complexity: The V6 engines, while smooth and powerful, can be challenging and expensive to repair due to their compact design and limited access to certain components.

Transmission Issues:

• Automatic Transmission Slippage: The automatic transmission, especially in high-mileage examples, can experience slippage or harsh shifting. Regular fluid changes are crucial, but rebuilding the transmission may be necessary in some cases.

Suspension and Steering Issues:

• Electronically Adjustable Suspension (EAS): This was a desirable feature when new, but now can be a source of headaches. The EAS system can be complex and difficult to diagnose and repair. Replacement parts may be hard to find and expensive. Consider models without the EAS system for improved reliability.
• Worn Suspension Components: Ball joints, bushings, and struts wear out over time, leading to poor handling and ride quality. A thorough inspection of the suspension is essential.
• Power Steering Leaks: Check for leaks around the power steering pump, lines, and rack.

Electrical Issues:

• Faulty Sensors: Age and corrosion can lead to sensor failures, affecting engine performance and triggering warning lights.
• Wiring Harness Degradation: Wiring can become brittle and crack over time, leading to shorts and electrical problems.
• Climate Control Issues: The automatic climate control system can be complex, and components like the AC compressor and blend door actuators can fail.

Body and Interior Issues:

• Rust: Check for rust, especially in areas prone to corrosion, such as the wheel arches, rocker panels, and undercarriage.
• Interior Trim Degradation: Plastic trim pieces can crack or fade over time. Leather upholstery may show wear and tear.

Driving Experience

The Efini MS-9 offers a comfortable and refined driving experience, typical of luxury sedans of its era. The V6 engines provide smooth and adequate power, while the suspension delivers a comfortable ride. However, its age should be considered when evaluating performance.

Pros:

• Smooth and Refined Ride: The MS-9 excels at providing a comfortable and quiet ride, making it a pleasant car for long journeys.
• Well-Equipped: The MS-9 came standard with a range of features, including power windows, power locks, air conditioning, and a premium sound system.
• Unique Styling: The pillarless hardtop design gives the MS-9 a distinctive and elegant appearance.
• V6 Power: The V6 engines offer adequate power for daily driving and highway cruising.

Cons:

• Age: Its age means that parts can be hard to find and repairs can be costly.
• Complexity: The electronic systems, especially the electronically adjustable suspension, can be difficult to diagnose and repair.
• Fuel Economy: Fuel economy is not a strong point, especially with the V6 engines.
• Limited Aftermarket Support: There is limited aftermarket support for the MS-9, making it difficult to find performance upgrades or replacement parts.

Buying Advice

If you're considering buying an Efini MS-9, keep the following in mind:

Years to Look For:

• Models from later production years (1994-1995) may have incorporated some minor improvements and may be in slightly better condition.

What to Avoid:

• Electronically Adjustable Suspension (EAS): Models equipped with EAS can be expensive to maintain. Unless you specifically want this feature, consider models without it.
• Neglected Examples: Avoid cars that have been poorly maintained or show signs of significant rust or damage.
• High-Mileage Examples: While not necessarily a deal-breaker, be prepared for potential maintenance issues with high-mileage examples.

Key Inspection Points:

• Engine: Check for oil leaks, coolant leaks, and unusual noises. Compression test is recommended.
• Transmission: Test for smooth shifting and any signs of slippage.
• Suspension: Inspect for worn components and any signs of leaks from the EAS system (if equipped).
• Brakes: Check brake pads, rotors, and brake lines for wear and leaks.
• Electrical System: Test all electrical components, including lights, windows, locks, and climate control.
• Rust: Thoroughly inspect the body for rust, especially in areas prone to corrosion.

Overall Recommendation:

The Efini MS-9 can be an interesting and unique classic car, offering a taste of Japanese luxury from the early 1990s. However, potential buyers should be aware of the potential maintenance challenges and should carefully inspect any prospective purchase. Look for well-maintained examples with complete service records. Be prepared to invest time and money in maintenance and repairs. A pre-purchase inspection by a qualified mechanic is highly recommended.

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