38 problems have been reported for the 2005 Cadillac XLR. The following chart shows the 15 most common problems for 2005 Cadillac XLR. The number one most common problem is related to the vehicle's structure with 13 problems. The second most common problem is related to the vehicle's exterior lighting (3 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 Cadillac XLR in the United States are 3,828 units [1]. If the total number of problems reported by Cadillac XLR owners in the last 19 years is 38, and the age of the vehicle is 19, the PPMY index can then be calculated as
PPMY Index = 38 / 3,828 / 19 * 1000 = 0.52.
For more information, refer to this page: A study of reliability comparison across Cadillac XLR model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2005 Cadillac XLR in 2005.
| Service Year | Number of Problems |
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| 2005 |
When making the decision between buying a new or used Cadillac XLR, the following table can be used to compare the 2005 Cadillac XLR with the Cadillac XLR from other model years. Note that the number of problems reported for the 2005 XLR is 38 while the average number of problems reported for the 6 model years of the Cadillac XLR is 15.