23 problems have been reported for the 2003 Volvo S40. The following chart shows the 10 most common problems for 2003 Volvo S40. The number one most common problem is related to the vehicle's power train with 6 problems. The second most common problem is related to the vehicle's electrical system (3 problems).
| Problem Category | Number of Problems |
|---|---|
| Power Train | |
| Electrical System | |
| Engine And Engine Cooling | |
| Vehicle Speed Control | |
| Suspension | |
| Gasoline Fuel System | |
| Tire | |
| Other Fuel System | |
| Unknown Or Other | |
| 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 2003 Volvo S40 in the United States are 10,458 units [1]. If the total number of problems reported by Volvo S40 owners in the last 19 years is 23, and the age of the vehicle is 19, the PPMY index can then be calculated as
PPMY Index = 23 / 10,458 / 19 * 1000 = 0.12.
For more information, refer to this page: A study of reliability comparison across Volvo S40 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2003 Volvo S40 in 2003.
| Service Year | Number of Problems |
|---|---|
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 | |
| 2008 | |
| 2007 | |
| 2006 | |
| 2005 | |
| 2004 | |
| 2003 |
When making the decision between buying a new or used Volvo S40, the following table can be used to compare the 2003 Volvo S40 with the Volvo S40 from other model years. Note that the number of problems reported for the 2003 S40 is 23 while the average number of problems reported for the 12 model years of the Volvo S40 is 56.