173 problems have been reported for the 2003 Infiniti M45. The following chart shows the 17 most common problems for 2003 Infiniti M45. The number one most common problem is related to the vehicle's fuel system, gasoline with 63 problems. The second most common problem is related to the vehicle's engine and engine cooling (39 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 Infiniti M45 in the United States are 6,381 units [1]. If the total number of problems reported by Infiniti M45 owners in the last 21 years is 173, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 173 / 6,381 / 21 * 1000 = 1.29.
For more information, refer to this page: A study of reliability comparison across Infiniti M45 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2003 Infiniti M45 in 2003.
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When making the decision between buying a new or used Infiniti M45, the following table can be used to compare the 2003 Infiniti M45 with the Infiniti M45 from other model years. Note that the number of problems reported for the 2003 M45 is 173 while the average number of problems reported for the 7 model years of the Infiniti M45 is 52.