The Infiniti QX56, a luxurious full-size SUV, has been a popular choice for those seeking comfort, power, and style. However, like any vehicle, certain model years have proven to be more problematic than others. This comprehensive guide will delve into the Infiniti QX56 years to avoid, focusing on the most common issues reported by owners and automotive experts. By understanding these potential pitfalls, you can make an informed decision when considering a used QX56 for purchase.
| Model Year | Major Issues | Reliability Rating |
|---|---|---|
| 2004-2010 | Timing chain problems, radiator failures | Average |
| 2011-2013 | Timing chain issues, catalytic converter failures | Below Average |
| 2014-2015 | Electrical problems, brake issues | Average |
| 2016-2017 | Minor issues, improved reliability | Above Average |
The Most Problematic Years: 2011-2013 Models
When it comes to the Infiniti QX56 years to avoid, the 2011-2013 models stand out as the most problematic. These years marked the transition to the second generation of the QX56, and unfortunately, they came with a host of issues that plagued many owners.
Timing Chain Problems
One of the most significant issues with the 2011-2013 QX56 models is related to the timing chain. Many owners have reported strange noises coming from the timing chain area, often described as whistling, whining, or hissing sounds. These noises typically occur when starting the vehicle and can last for several minutes.
"My timing chain was stretched. This is the same problem the Infiniti QX56 had. My QX80 has the same motor and replacement timing chain part. The QX56 was issued a voluntary service campaign for this problem. My chain has not been included."[3]
The timing chain issue is not just a matter of annoying sounds; it can lead to serious engine damage if left unaddressed. In some cases, the timing chain may stretch or break, causing the engine to fail completely. Repairs for this issue can be costly, often ranging from $1,500 to $3,000 or more, depending on the extent of the damage.
Catalytic Converter Failures
Another common problem with the 2011-2013 QX56 models is premature failure of the catalytic converters. The catalytic converter is a crucial component of the vehicle's emissions control system, and its failure can lead to decreased performance, reduced fuel efficiency, and even engine damage.
"The biggest issue you will have is with the catalytic converters, both the 56 and 80 had the cats fail right after the warranty. The 56 cats were $1700 (I went to Nissan dealership as it was cheaper) however the 80 ones cost me $2600 from Infiniti, at that time, Nissan did not have an Armada version with similar parts."[2]
Many owners have reported that their catalytic converters failed shortly after the warranty period expired, leading to expensive repairs. The cost of replacing catalytic converters on the QX56 can be particularly high due to the vehicle's size and the number of converters it uses.
2014-2015 Models: Improved But Not Perfect
While the 2014-2015 QX56 (renamed QX80 in 2014) models showed some improvements over their predecessors, they still had their share of issues that potential buyers should be aware of.
Electrical Problems
One of the most commonly reported issues with the 2014-2015 models is related to the electrical system, particularly battery-related problems. Some owners have experienced repeated instances of dead batteries, even in relatively new vehicles.
"On three occasions the battery in my 2019 QX80 has died for no apparent reason. The car is a 2019 and the battery died 8 months, 10 months, and now 13 months after purchasing it brand new. Each time the car has driven fine in the morning on my way to work but when I tried to turn it on to head home it didn't start."[3]
While this quote refers to a 2019 model, similar issues have been reported in the 2014-2015 models. These electrical problems can be frustrating and potentially leave owners stranded if the battery fails unexpectedly.
Brake Issues
Some owners of 2014-2015 QX56/QX80 models have reported problems with the braking system. These issues range from premature wear of brake components to more serious problems like brake failure. While not as widespread as the timing chain or catalytic converter issues in earlier models, these brake problems can be a safety concern and should be taken seriously.
Earlier Models: 2004-2010
The first generation of the Infiniti QX56, spanning from 2004 to 2010, also had its share of problems. While these models are generally considered more reliable than the 2011-2013 years, they still have some issues that potential buyers should be aware of.
Radiator Failures
One of the most significant problems reported in the 2004-2010 QX56 models is radiator failure. In some cases, the radiator would leak coolant into the transmission, causing severe damage to both components.
"The 2008 Infiniti QX56 radiator helps keep the engine running at a safe temperature. However, some drivers have reported that their radiator leaks coolant fluid into the transmission. The radiator stores both engine coolant and transmission fluid. If the barrier between the two fluids cracked from wear or damage, the coolant and oil could mix together."[1]
This issue can lead to catastrophic transmission failure if not addressed promptly. The cost of repairing or replacing both the radiator and transmission can be substantial, often exceeding $5,000.
Fuel Gauge Inaccuracy
Another common complaint among owners of 2004-2010 QX56 models is inaccurate fuel gauge readings. This issue can cause significant inconvenience and potentially leave drivers stranded if they run out of fuel unexpectedly.
According to reports, the fuel gauge may show inaccurate readings, such as indicating a quarter tank when the vehicle is actually running on empty. This problem appears to be most prevalent in the 2004-2009 model years.
More Recent Models: 2016 and Beyond
While the focus of this article is on the years to avoid, it's worth noting that more recent models of the Infiniti QX56 (now QX80) have shown improved reliability. The 2016 and newer models have fewer reported issues, suggesting that Infiniti has addressed many of the problems that plagued earlier years.
Improvements in Reliability
According to RepairPal, the Infiniti QX80 (the successor to the QX56) has a reliability rating of 3.5 out of 5.0, ranking it 1st out of 19 luxury full-size SUVs[4]. This suggests that newer models have made significant strides in terms of reliability.
However, it's important to note that these vehicles still have higher than average ownership costs due to their luxury status and size. Regular maintenance and prompt attention to any issues that arise are key to keeping these vehicles running smoothly.
Factors to Consider When Buying a Used QX56
If you're considering purchasing a used Infiniti QX56, there are several factors you should keep in mind to ensure you're making a wise investment:
- Service History: Always request and review the vehicle's service history. Regular maintenance can help prevent many of the issues discussed in this article.
- Mileage: Higher mileage vehicles are more likely to experience problems, especially if they haven't been well-maintained.
- Pre-Purchase Inspection: Have a trusted mechanic perform a thorough inspection before buying. They may catch potential issues that aren't immediately apparent.
- Recall Status: Check if all applicable recalls have been addressed. You can do this using the vehicle's VIN on the NHTSA website.
- Extended Warranty: Consider purchasing an extended warranty, especially for models known to have reliability issues.
Conclusion: Balancing Luxury and Reliability
The Infiniti QX56 offers a compelling blend of luxury, power, and spaciousness. However, as we've seen, certain model years are more prone to issues than others. The 2011-2013 model years stand out as the most problematic, with significant issues related to timing chains and catalytic converters. The 2004-2010 models, while generally more reliable, still have their share of problems, particularly with radiator failures and fuel gauge inaccuracies.
For those set on owning a QX56, the 2016 and newer models appear to offer the best balance of luxury and reliability. However, even with these newer models, it's important to remember that as a large luxury SUV, the QX56/QX80 will likely have higher than average ownership costs.
Ultimately, the key to a positive ownership experience with any used vehicle, including the Infiniti QX56, lies in thorough research, careful inspection, and consistent maintenance. By being aware of the potential issues and taking proactive steps to address them, you can enjoy the luxury and performance of the QX56 while minimizing the risk of costly repairs.
FAQs
- What is the most reliable year for the Infiniti QX56?
The 2016 and newer models are generally considered the most reliable, with fewer reported issues. - How much does it cost to replace the timing chain on an Infiniti QX56?
Timing chain replacement can cost between $1,500 to $3,000, depending on the extent of the damage and labor costs. - Are Infiniti QX56 expensive to maintain?
Yes, as a luxury full-size SUV, the QX56 typically has higher than average maintenance costs. - What is the average lifespan of an Infiniti QX56?
With proper maintenance, an Infiniti QX56 can last 200,000 miles or more. - Is the Infiniti QX56 a reliable vehicle overall?
While certain years have issues, newer models (2016+) are considered relatively reliable for their class.