2 problems have been reported for the 2021 Lexus IS. The following chart shows the 1 most common problems for 2021 Lexus IS. The number one most common problem is related to the vehicle's equipment with 2 problems.
| Problem Category | Number of Problems |
|---|---|
| Equipment |
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 2021 Lexus IS in the United States are 23,813 units [1]. If the total number of problems reported by Lexus IS owners in the last 4 years is 2, and the age of the vehicle is 4, the PPMY index can then be calculated as
PPMY Index = 2 / 23,813 / 4 * 1000 = 0.02.
For more information, refer to this page: A study of reliability comparison across Lexus IS model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 Lexus IS in 2021.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used Lexus IS, the following table can be used to compare the 2021 Lexus IS with the Lexus IS from other model years. Note that the number of problems reported for the 2021 IS is 2 while the average number of problems reported for the 25 model years of the Lexus IS is 30.