126 problems have been reported for the 2005 Lincoln LS. The following chart shows the 18 most common problems for 2005 Lincoln LS. The number one most common problem is related to the vehicle's electrical system with 21 problems. The second most common problem is related to the vehicle's engine and engine cooling (20 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 2005 Lincoln LS in the United States are 21,775 units [1]. If the total number of problems reported by Lincoln LS owners in the last 18 years is 126, and the age of the vehicle is 18, the PPMY index can then be calculated as
PPMY Index = 126 / 21,775 / 18 * 1000 = 0.32.
For more information, refer to this page: A study of reliability comparison across Lincoln LS model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2005 Lincoln LS in 2005.
| Service Year | Number of Problems |
|---|---|
| 2023 | |
| 2022 | |
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| 2005 |
When making the decision between buying a new or used Lincoln LS, the following table can be used to compare the 2005 Lincoln LS with the Lincoln LS from other model years. Note that the number of problems reported for the 2005 LS is 126 while the average number of problems reported for the 7 model years of the Lincoln LS is 192.