304 problems have been reported for the 2001 Nissan Sentra. The following chart shows the 20 most common problems for 2001 Nissan Sentra. The number one most common problem is related to the vehicle's engine and engine cooling with 112 problems. The second most common problem is related to the vehicle's electrical system (49 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 2001 Nissan Sentra in the United States are 106,047 units [1]. If the total number of problems reported by Nissan Sentra owners in the last 21 years is 304, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 304 / 106,047 / 21 * 1000 = 0.14.
For more information, refer to this page: A study of reliability comparison across Nissan Sentra model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2001 Nissan Sentra in 2001.
| Service Year | Number of Problems |
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| 2001 |
When making the decision between buying a new or used Nissan Sentra, the following table can be used to compare the 2001 Nissan Sentra with the Nissan Sentra from other model years. Note that the number of problems reported for the 2001 Sentra is 304 while the average number of problems reported for the 26 model years of the Nissan Sentra is 218.