101 problems have been reported for the 2005 Volvo S40. The following chart shows the 18 most common problems for 2005 Volvo S40. The number one most common problem is related to the vehicle's electrical system with 20 problems. The second most common problem is related to the vehicle's engine and engine cooling (16 problems).
The following chart shows the number of problems reported during each of the service years since the debut of the 2005 Volvo S40 in 2005.
| Service Year | Number of Problems |
|---|---|
| 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 Volvo S40, the following table can be used to compare the 2005 Volvo S40 with the Volvo S40 from other model years. Note that the number of problems reported for the 2005 S40 is 101 while the average number of problems reported for the 12 model years of the Volvo S40 is 57.