24 problems have been reported for the 2009 Lexus LS. The following chart shows the 10 most common problems for 2009 Lexus LS. The number one most common problem is related to the vehicle's engine and engine cooling with 4 problems. The second most common problem is related to the vehicle's service brakes, hydraulic (4 problems).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling | |
| Service Brakes | |
| Power Train | |
| Electrical System | |
| Vehicle Speed Control | |
| Other Fuel System | |
| Wheel | |
| Equipment | |
| Visibility | |
| Steering |
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 Lexus LS in the United States are 9,198 units [1]. If the total number of problems reported by Lexus LS owners in the last 16 years is 24, and the age of the vehicle is 16, the PPMY index can then be calculated as
PPMY Index = 24 / 9,198 / 16 * 1000 = 0.16.
For more information, refer to this page: A study of reliability comparison across Lexus LS model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Lexus LS in 2009.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 |
When making the decision between buying a new or used Lexus LS, the following table can be used to compare the 2009 Lexus LS with the Lexus LS from other model years. Note that the number of problems reported for the 2009 LS is 24 while the average number of problems reported for the 24 model years of the Lexus LS is 10.