115 problems have been reported for the 1999 Subaru Legacy. The following chart shows the 21 most common problems for 1999 Subaru Legacy. The number one most common problem is related to the vehicle's power train with 18 problems. The second most common problem is related to the vehicle's service brakes, hydraulic (15 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 1999 Subaru Legacy in the United States are 97,439 units [1]. If the total number of problems reported by Subaru Legacy owners in the last 23 years is 115, and the age of the vehicle is 23, the PPMY index can then be calculated as
PPMY Index = 115 / 97,439 / 23 * 1000 = 0.05.
For more information, refer to this page: A study of reliability comparison across Subaru Legacy model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 1999 Subaru Legacy in 1999.
| Service Year | Number of Problems |
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When making the decision between buying a new or used Subaru Legacy, the following table can be used to compare the 1999 Subaru Legacy with the Subaru Legacy from other model years. Note that the number of problems reported for the 1999 Legacy is 115 while the average number of problems reported for the 27 model years of the Subaru Legacy is 103.