25 problems have been reported for the 2021 Nissan Frontier. The following chart shows the 12 most common problems for 2021 Nissan Frontier. The number one most common problem is related to the vehicle's power train with 4 problems. The second most common problem is related to the vehicle's electrical system (4 problems).
| Problem Category | Number of Problems |
|---|---|
| Power Train | |
| Electrical System | |
| Equipment | |
| Other Fuel System | |
| Air Bag | |
| Forward Collision Avoidance | |
| Seats | |
| Tire | |
| Service Brakes | |
| Engine And Engine Cooling | |
| Seat Belt | |
| Exterior Lighting |
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 2021 Nissan Frontier in the United States are 23,923 units [1]. If the total number of problems reported by Nissan Frontier owners in the last 4 years is 25, and the age of the vehicle is 4, the PPMY index can then be calculated as
PPMY Index = 25 / 23,923 / 4 * 1000 = 0.26.
For more information, refer to this page: A study of reliability comparison across Nissan Frontier model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 Nissan Frontier in 2021.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used Nissan Frontier, the following table can be used to compare the 2021 Nissan Frontier with the Nissan Frontier from other model years. Note that the number of problems reported for the 2021 Frontier is 25 while the average number of problems reported for the 28 model years of the Nissan Frontier is 150.