402 problems have been reported for the 2001 Ford Explorer. The following chart shows the 21 most common problems for 2001 Ford Explorer. The number one most common problem is related to the vehicle's tires with 54 problems. The second most common problem is related to the vehicle's engine and engine cooling (42 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 Ford Explorer in the United States are 227,748 units [1]. If the total number of problems reported by Ford Explorer owners in the last 21 years is 402, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 402 / 227,748 / 21 * 1000 = 0.08.
For more information, refer to this page: A study of reliability comparison across Ford Explorer model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2001 Ford Explorer in 2001.
| Service Year | Number of Problems |
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| 2001 |
When making the decision between buying a new or used Ford Explorer, the following table can be used to compare the 2001 Ford Explorer with the Ford Explorer from other model years. Note that the number of problems reported for the 2001 Explorer is 402 while the average number of problems reported for the 26 model years of the Ford Explorer is 955.