381 problems have been reported for the 2009 Ford F-150. The following chart shows the 21 most common problems for 2009 Ford F-150. The number one most common problem is related to the vehicle's vehicle speed control with 51 problems. The second most common problem is related to the vehicle's engine and engine cooling (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 2009 Ford F-150 in the United States are 207,731 units [1]. If the total number of problems reported by Ford F-150 owners in the last 17 years is 381, and the age of the vehicle is 17, the PPMY index can then be calculated as
PPMY Index = 381 / 207,731 / 17 * 1000 = 0.11.
For more information, refer to this page: A study of reliability comparison across Ford F-150 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Ford F-150 in 2009.
| Service Year | Number of Problems |
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| 2026 | |
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| 2009 |
When making the decision between buying a new or used Ford F-150, the following table can be used to compare the 2009 Ford F-150 with the Ford F-150 from other model years. Note that the number of problems reported for the 2009 F-150 is 381 while the average number of problems reported for the 30 model years of the Ford F-150 is 1,337.