90 problems have been reported for the 2003 Nissan Frontier. The following chart shows the 16 most common problems for 2003 Nissan Frontier. The number one most common problem is related to the vehicle's fuel system, gasoline with 13 problems. The second most common problem is related to the vehicle's suspension (11 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 2003 Nissan Frontier in the United States are 68,370 units [1]. If the total number of problems reported by Nissan Frontier owners in the last 21 years is 90, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 90 / 68,370 / 21 * 1000 = 0.06.
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 2003 Nissan Frontier in 2003.
| Service Year | Number of Problems |
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| 2003 |
When making the decision between buying a new or used Nissan Frontier, the following table can be used to compare the 2003 Nissan Frontier with the Nissan Frontier from other model years. Note that the number of problems reported for the 2003 Frontier is 90 while the average number of problems reported for the 26 model years of the Nissan Frontier is 153.