13 problems have been reported for the 1999 Cadillac STS. The following chart shows the 4 most common problems for 1999 Cadillac STS. The number one most common problem is related to the vehicle's electrical system with 6 problems. The second most common problem is related to the vehicle's engine and engine cooling (5 problems).
| Problem Category | Number of Problems |
|---|---|
| Electrical System | |
| Engine And Engine Cooling | |
| Steering | |
| Equipment |
The following chart shows the number of problems reported during each of the service years since the debut of the 1999 Cadillac STS in 1999.
| 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 | |
| 2002 | |
| 2001 | |
| 2000 | |
| 1999 |
When making the decision between buying a new or used Cadillac STS, the following table can be used to compare the 1999 Cadillac STS with the Cadillac STS from other model years. Note that the number of problems reported for the 1999 STS is 13 while the average number of problems reported for the 14 model years of the Cadillac STS is 38.