60 problems have been reported for the 2018 Infiniti Q50. The following chart shows the 17 most common problems for 2018 Infiniti Q50. The number one most common problem is related to the vehicle's engine and engine cooling with 19 problems. The second most common problem is related to the vehicle's equipment (6 problems).
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 2018 Infiniti Q50 in the United States are 42,262 units [1]. If the total number of problems reported by Infiniti Q50 owners in the last 8 years is 60, and the age of the vehicle is 8, the PPMY index can then be calculated as
PPMY Index = 60 / 42,262 / 8 * 1000 = 0.18.
For more information, refer to this page: A study of reliability comparison across Infiniti Q50 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2018 Infiniti Q50 in 2018.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 |
When making the decision between buying a new or used Infiniti Q50, the following table can be used to compare the 2018 Infiniti Q50 with the Infiniti Q50 from other model years. Note that the number of problems reported for the 2018 Q50 is 60 while the average number of problems reported for the 10 model years of the Infiniti Q50 is 68.