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Infiniti Q56

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Infiniti QX56/QX80: A Comprehensive Guide

The Infiniti QX56, later renamed the QX80, is a full-size luxury SUV produced by Nissan's luxury division, Infiniti. Built as a capable and comfortable family hauler, it offered a blend of luxury features, powerful performance, and rugged capabilities, making it a strong contender in the premium SUV market. The QX series targeted affluent buyers seeking a refined alternative to other large SUVs and a more luxurious experience than Nissan's Armada.

Generations

First Generation (JA60; 2004-2010, QX56)

The first-generation QX56 was based on the Nissan Armada platform. Key characteristics included:

  • Years: 2004-2010
  • Engine: 5.6L VK56DE V8 engine, producing around 315-320 horsepower (depending on year).
  • Transmission: 5-speed automatic transmission.
  • Features: Standard leather upholstery, premium audio system, available navigation system, and third-row seating.
  • Styling: Distinctive, some would say polarizing, styling with a large front grille and bulky proportions.
  • Changes During Production: Minor styling updates and feature enhancements over the years.

Second Generation (Z62; 2011-2024, QX56/QX80)

The second-generation QX marked a significant departure in terms of design and features, moving further upscale. The QX56 was renamed the QX80 for the 2014 model year as part of Infiniti's new naming convention. Key characteristics included:

  • Years: 2011-2024 (QX56: 2011-2013; QX80: 2014-2024)
  • Engine: 5.6L VK56VD V8 engine with direct injection, producing 400-420 horsepower (depending on year).
  • Transmission: 7-speed automatic transmission.
  • Features: Improved interior materials, advanced safety features like blind-spot monitoring and lane departure warning, updated infotainment system, and hydraulic body motion control system (HBMC) for improved handling.
  • Styling: A more refined and contemporary exterior design compared to the first generation, though still large and imposing.
  • Changes During Production: Facelifts in 2015 and 2018 brought updated exterior styling, interior refinements, and technology upgrades.

Reliability & Common Issues

First Generation (JA60; 2004-2010)

The first-generation QX56, while generally reliable, had a few common issues to watch out for:

  • Rear Air Suspension: The rear air suspension system is a common point of failure. Look for sagging rear end or a compressor that runs constantly. Replacement parts can be expensive. Consider converting to coil springs as a more permanent solution.
  • Exhaust Manifold Cracks: The exhaust manifolds, especially on earlier models, are prone to cracking. Listen for a ticking sound, particularly when the engine is cold.
  • Cooling System: Check for coolant leaks, especially around the radiator and hoses. Regular coolant flushes are crucial for preventing corrosion and damage to the engine.
  • Transmission Issues: While the transmission is generally robust, ensure it shifts smoothly through all gears. Check for slipping or harsh shifts. Regular transmission fluid changes are essential.
  • Brake Issues: Warped brake rotors are common, especially with heavy use. Inspect the rotors for signs of wear or unevenness.

Second Generation (Z62; 2011-2024)

The second-generation QX56/QX80 is generally more reliable than the first generation, but it also has its share of potential problems:

  • Hydraulic Body Motion Control (HBMC) System: This system, while improving handling, can be expensive to repair. Check for leaks in the hydraulic lines or reservoirs. Listen for unusual noises from the system. Proper maintenance, including fluid changes, is critical.
  • Infotainment System Glitches: The infotainment system can be prone to glitches or malfunctions. Check that all features are working properly, including the navigation, audio, and climate control.
  • Timing Chain Tensioner: The VK56VD engine can sometimes experience issues with the timing chain tensioner, potentially leading to engine damage. Listen for rattling noises, especially on startup. This is less common than the air suspension issue on the first gen but a pricey repair if it occurs.
  • Fuel Injectors: Direct injection engines are more prone to carbon buildup on the fuel injectors. Look for rough idling or misfires. Consider regular fuel injector cleaning as preventative maintenance.
  • Rust: While not as prevalent as in older vehicles, inspect the undercarriage for rust, especially in areas with harsh winters.

Driving Experience

First Generation (JA60; 2004-2010)

The first-generation QX56 offered a comfortable and capable driving experience, but with some compromises:

  • Pros: Strong engine performance, comfortable ride (especially with the air suspension), spacious interior, and good towing capacity.
  • Cons: Bulky handling, subpar fuel economy, outdated technology, and polarizing styling.

Second Generation (Z62; 2011-2024)

The second-generation QX56/QX80 offered a more refined and luxurious driving experience:

  • Pros: Powerful engine with improved fuel economy (compared to the first generation), luxurious interior, advanced technology features, comfortable ride (especially with HBMC), and improved handling.
  • Cons: Large size can be difficult to maneuver in tight spaces, styling can be polarizing for some, and the HBMC system can be expensive to repair. The infotainment system, while improved, can still feel dated compared to competitors in later model years.

Buying Advice

First Generation (JA60; 2004-2010)

If you're considering a first-generation QX56, prioritize reliability and budget. These are now older vehicles, so maintenance history is crucial. Be prepared to address potential issues like the air suspension and exhaust manifolds.

  • Years to Look For: 2008-2010 models may offer slightly improved reliability and updated features.
  • Years to Avoid: No specific years to avoid, but meticulously inspect all vehicles, regardless of year.
  • Key Checks: Thoroughly inspect the air suspension system, exhaust manifolds, cooling system, and transmission. Pay attention to any unusual noises or vibrations.
  • Considerations: These are relatively inexpensive for a large SUV, but factor in potential maintenance costs. A pre-purchase inspection by a qualified mechanic is highly recommended.

Second Generation (Z62; 2011-2024)

The second-generation QX56/QX80 offers a more luxurious and modern experience, but comes with a higher price tag. Focus on finding a well-maintained vehicle with a comprehensive service history.

  • Years to Look For: 2018 and newer models offer the most updated styling and technology. 2014+ models provide the QX80 designation which may assist in resale later.
  • Years to Avoid: No specific years to avoid, but pay close attention to the condition of the HBMC system on models equipped with it.
  • Key Checks: Inspect the HBMC system for leaks or unusual noises. Check the infotainment system for proper functionality. Listen for any rattling noises that could indicate timing chain issues.
  • Considerations: While more reliable than the first generation, the second generation can still be expensive to repair. Budget accordingly for potential maintenance costs. A pre-purchase inspection is still highly recommended.
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