78 problems have been reported for the 2005 Lexus ES. The following chart shows the 17 most common problems for 2005 Lexus ES. The number one most common problem is related to the vehicle's power train with 25 problems. The second most common problem is related to the vehicle's vehicle speed control (15 problems).
| Problem Category | Number of Problems |
|---|---|
| Power Train | |
| Vehicle Speed Control | |
| Air Bag | |
| Steering | |
| Exterior Lighting | |
| Suspension | |
| Engine And Engine Cooling | |
| Equipment | |
| Structure | |
| Tire | |
| Electrical System | |
| Wheel | |
| Unknown Or Other | |
| Seats | |
| Child Seat | |
| Gasoline Fuel System | |
| Service Brakes |
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 Lexus ES in the United States are 80,735 units [1]. If the total number of problems reported by Lexus ES owners in the last 20 years is 78, and the age of the vehicle is 20, the PPMY index can then be calculated as
PPMY Index = 78 / 80,735 / 20 * 1000 = 0.05.
For more information, refer to this page: A study of reliability comparison across Lexus ES model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2005 Lexus ES in 2005.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 | |
| 2008 | |
| 2007 | |
| 2006 | |
| 2005 |
When making the decision between buying a new or used Lexus ES, the following table can be used to compare the 2005 Lexus ES with the Lexus ES from other model years. Note that the number of problems reported for the 2005 ES is 78 while the average number of problems reported for the 30 model years of the Lexus ES is 26.