95 problems have been reported for the 2011 Infiniti QX56. The following chart shows the 13 most common problems for 2011 Infiniti QX56. The number one most common problem is related to the vehicle's engine and engine cooling with 39 problems. The second most common problem is related to the vehicle's fuel system, other (18 problems).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling | |
| Other Fuel System | |
| Equipment | |
| Suspension | |
| Power Train | |
| Visibility | |
| Electrical System | |
| Air Bag | |
| Gasoline Fuel System | |
| Vehicle Speed Control | |
| Structure | |
| Wheel | |
| Steering |
In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the problems reported per thousand vehicles per Year. The total sales of the 2011 Infiniti QX56 in the United States are 16,763 units [1]. If the total number of problems reported by Infiniti QX56 owners in the last 15 years is 95, and the age of the vehicle is 15, the PPMY index can then be calculated as
PPMY Index = 95 / 16,763 / 15 * 1000 = 0.38.
For more information, refer to this page: A study of reliability comparison across Infiniti QX56 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2011 Infiniti QX56 in 2011.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 |
When making the decision between buying a new or used Infiniti QX56, the following table can be used to compare the 2011 Infiniti QX56 with the Infiniti QX56 from other model years. Note that the number of problems reported for the 2011 QX56 is 95 while the average number of problems reported for the 10 model years of the Infiniti QX56 is 68.