The Infiniti QX56, a full-size luxury SUV, offered a blend of powerful performance and upscale amenities. Choosing the right model year is crucial to ensure a reliable and enjoyable ownership experience. This guide provides a comprehensive overview of the best and worst years for the Infiniti QX56, helping you make an informed decision.

Infiniti QX56 Model Year Overview: Reliability, Features, and Common Issues

Model Year Key Features & Improvements Potential Issues & Concerns
2004-2007 (First Generation) Strong VK56DE engine, spacious interior, comfortable ride, standard features like leather seats and Bose audio. Potential for cracked exhaust manifolds, oil consumption issues, transmission problems, and electrical glitches. Rust can be a significant issue, especially in northern climates.
2008-2010 (First Generation - Facelift) Updated exterior styling, minor interior improvements, enhanced safety features. Same potential issues as earlier models, including exhaust manifolds, oil consumption, transmission problems, and electrical glitches. Rust remains a concern.
2011-2013 (Second Generation - QX56) Completely redesigned with a more luxurious interior, upgraded technology, and a more powerful VK56VD engine with direct injection. Improved fuel economy compared to the first generation. Some reports of direct injection fuel system issues (carbon buildup), potential for air suspension problems, and occasional electronic glitches.
2014-2017 (Second Generation - QX80) Renamed QX80, further styling updates, enhanced infotainment system. Mechanically very similar to the 2011-2013 QX56. Similar potential issues to the 2011-2013 models, including fuel system concerns and air suspension problems.

Detailed Explanations

2004-2007 (First Generation)

The first generation QX56 was based on the Nissan Armada and offered a robust V8 engine and a comfortable ride. It was a strong contender in the full-size SUV market, providing a good balance of power, space, and features. However, these early models are now getting older, and potential buyers should be aware of common issues related to age and wear.

Potential Issues & Concerns (2004-2007):

  • Cracked Exhaust Manifolds: A common and relatively expensive repair on these models. The cast iron manifolds are prone to cracking due to thermal stress.
  • Oil Consumption Issues: Some owners have reported excessive oil consumption, which can lead to engine damage if not monitored and addressed.
  • Transmission Problems: The automatic transmission can experience issues, including slipping or harsh shifting, especially at higher mileages.
  • Electrical Glitches: Various electrical issues, such as problems with the power windows, door locks, or audio system, are not uncommon.
  • Rust: Rust is a significant concern, particularly in areas with road salt. Carefully inspect the undercarriage and body panels for signs of corrosion.

2008-2010 (First Generation - Facelift)

The facelifted first-generation QX56 received updated styling and some minor interior improvements. While these models are generally more refined than the earlier versions, they still share many of the same potential issues. The facelifted models often command a slightly higher price, but the mechanical similarities mean the same potential problems persist.

Potential Issues & Concerns (2008-2010):

  • Cracked Exhaust Manifolds: This issue remains prevalent in the facelifted models.
  • Oil Consumption Issues: The oil consumption problem can still be present.
  • Transmission Problems: Transmission issues remain a concern, similar to the earlier models.
  • Electrical Glitches: Electrical problems can still occur.
  • Rust: Rust continues to be a concern, especially in regions with harsh winters and salted roads.

2011-2013 (Second Generation - QX56)

The second-generation QX56 represented a significant upgrade, featuring a new engine, a more luxurious interior, and updated technology. The VK56VD engine with direct injection offered improved performance and fuel economy compared to the previous generation. This generation is generally considered more reliable than the first.

Potential Issues & Concerns (2011-2013):

  • Direct Injection Fuel System Issues (Carbon Buildup): Direct injection engines are prone to carbon buildup on the intake valves, which can reduce performance and fuel economy. Regular maintenance, such as intake valve cleaning, may be necessary.
  • Air Suspension Problems: The air suspension system can experience issues, such as leaks or compressor failures. These repairs can be costly.
  • Electronic Glitches: While less common than in the first generation, occasional electronic glitches can still occur.

2014-2017 (Second Generation - QX80)

The QX80 is essentially a facelifted version of the second-generation QX56. The mechanical components are largely the same, so the reliability and potential issues are similar. The primary differences are cosmetic and feature-related.

Potential Issues & Concerns (2014-2017):

  • Direct Injection Fuel System Issues (Carbon Buildup): The carbon buildup issue remains a concern.
  • Air Suspension Problems: Air suspension problems can still occur.
  • Electronic Glitches: Electronic glitches can still arise, although they are generally infrequent.

Frequently Asked Questions

  • Which is the most reliable Infiniti QX56 year? The 2011-2013 QX56 models are generally considered the most reliable due to the updated engine and improved design. However, the 2014-2017 QX80 models are mechanically very similar and can also be a good choice.

  • Are the first-generation QX56 models worth buying? They can be a good value if you find one in good condition with well-documented maintenance history. However, be prepared for potential repairs due to their age.

  • What should I look for when buying a used QX56? Check for rust, oil leaks, transmission issues, and exhaust manifold cracks. Also, inspect the air suspension system and have the engine checked for carbon buildup if you are considering a second-generation model.

  • How much does it cost to replace the exhaust manifolds on a QX56? Exhaust manifold replacement can cost between $1,000 and $2,000, depending on the shop and whether you replace both manifolds.

  • Is the air suspension on the QX56 reliable? The air suspension can be prone to issues, especially as the vehicle ages. Be sure to inspect it thoroughly for leaks or compressor problems.

  • Is the QX56 expensive to maintain? As a luxury SUV with a large engine, the QX56 can be more expensive to maintain than a smaller, more fuel-efficient vehicle. Regular maintenance and potential repairs can add up.

  • What is the gas mileage like on the QX56? The first-generation QX56 gets poor gas mileage, typically around 12-14 mpg in the city and 17-19 mpg on the highway. The second-generation models offer slightly better fuel economy due to the direct-injection engine.

  • What is the difference between the QX56 and the QX80? The QX80 is essentially a facelifted version of the second-generation QX56. The mechanical components are largely the same.

Conclusion

Choosing the right year for your Infiniti QX56 is crucial for a positive ownership experience. While the 2011-2013 QX56 and 2014-2017 QX80 offer the best combination of features, performance, and reliability, be sure to thoroughly inspect any used vehicle before purchasing and factor in potential maintenance costs.