1,093 problems have been reported for the 2003 Nissan Altima. The following chart shows the 21 most common problems for 2003 Nissan Altima. The number one most common problem is related to the vehicle's engine and engine cooling with 579 problems. The second most common problem is related to the vehicle's structure (119 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 Altima in the United States are 225,702 units [1]. If the total number of problems reported by Nissan Altima owners in the last 21 years is 1093, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 1093 / 225,702 / 21 * 1000 = 0.23.
For more information, refer to this page: A study of reliability comparison across Nissan Altima 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 Altima in 2003.
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When making the decision between buying a new or used Nissan Altima, the following table can be used to compare the 2003 Nissan Altima with the Nissan Altima from other model years. Note that the number of problems reported for the 2003 Altima is 1,093 while the average number of problems reported for the 29 model years of the Nissan Altima is 639.