177 problems have been reported for the 2003 Lincoln Navigator. The following chart shows the 20 most common problems for 2003 Lincoln Navigator. The number one most common problem is related to the vehicle's suspension with 39 problems. The second most common problem is related to the vehicle's electrical system (23 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 2003 Lincoln Navigator in the United States are 47,143 units [1]. If the total number of problems reported by Lincoln Navigator owners in the last 23 years is 177, and the age of the vehicle is 23, the PPMY index can then be calculated as
PPMY Index = 177 / 47,143 / 23 * 1000 = 0.16.
For more information, refer to this page: A study of reliability comparison across Lincoln Navigator model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2003 Lincoln Navigator in 2003.
| 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 | |
| 2003 |
When making the decision between buying a new or used Lincoln Navigator, the following table can be used to compare the 2003 Lincoln Navigator with the Lincoln Navigator from other model years. Note that the number of problems reported for the 2003 Navigator is 177 while the average number of problems reported for the 28 model years of the Lincoln Navigator is 61.