19 problems have been reported for the 2004 Lexus ES. The following chart shows the 10 most common problems for 2004 Lexus ES. The number one most common problem is related to the vehicle's vehicle speed control with 5 problems. The second most common problem is related to the vehicle's air bags (4 problems).
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control | |
| Air Bag | |
| Power Train | |
| Engine And Engine Cooling | |
| Visibility | |
| Service Brakes | |
| Electrical System | |
| Equipment | |
| Other Fuel System | |
| Unknown Or Other |
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 2004 Lexus ES in the United States are 70,774 units [1]. If the total number of problems reported by Lexus ES owners in the last 18 years is 19, and the age of the vehicle is 18, the PPMY index can then be calculated as
PPMY Index = 19 / 70,774 / 18 * 1000 = 0.01.
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 2004 Lexus ES in 2004.
| Service Year | Number of Problems |
|---|---|
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 | |
| 2008 | |
| 2007 | |
| 2006 | |
| 2005 | |
| 2004 |
When making the decision between buying a new or used Lexus ES, the following table can be used to compare the 2004 Lexus ES with the Lexus ES from other model years. Note that the number of problems reported for the 2004 ES is 19 while the average number of problems reported for the 19 model years of the Lexus ES is 30.