337 problems have been reported for the 2004 Mercury Monterey. The following chart shows the 22 most common problems for 2004 Mercury Monterey. The number one most common problem is related to the vehicle's power train with 209 problems. The second most common problem is related to the vehicle's structure (17 problems).
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 Mercury Monterey in the United States are 20,687 units [1]. If the total number of problems reported by Mercury Monterey owners in the last 22 years is 337, and the age of the vehicle is 22, the PPMY index can then be calculated as
PPMY Index = 337 / 20,687 / 22 * 1000 = 0.74.
For more information, refer to this page: A study of reliability comparison across Mercury Monterey model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2004 Mercury Monterey in 2004.
| Service Year | Number of Problems |
|---|---|
| 2026 | |
| 2025 | |
| 2024 | |
| 2023 | |
| 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 Mercury Monterey, the following table can be used to compare the 2004 Mercury Monterey with the Mercury Monterey from other model years. Note that the number of problems reported for the 2004 Monterey is 337 while the average number of problems reported for the 4 model years of the Mercury Monterey is 134.
| Model Year | Number of Problems |
|---|---|
| 2007 Monterey | |
| 2006 Monterey | |
| 2005 Monterey | |
| 2004 Monterey |