128 problems have been reported for the 2009 Lincoln MKZ. The following chart shows the 15 most common problems for 2009 Lincoln MKZ. The number one most common problem is related to the vehicle's air bags with 67 problems. The second most common problem is related to the vehicle's service brakes, hydraulic (25 problems).
| Problem Category | Number of Problems |
|---|---|
| Air Bag | |
| Service Brakes | |
| Wheel | |
| Engine And Engine Cooling | |
| Equipment | |
| Vehicle Speed Control | |
| Power Train | |
| Electrical System | |
| Steering | |
| Structure | |
| Visibility | |
| Seat Belt | |
| Tire | |
| Other Fuel System | |
| Suspension |
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 2009 Lincoln MKZ in the United States are 16,686 units [1]. If the total number of problems reported by Lincoln MKZ owners in the last 16 years is 128, and the age of the vehicle is 16, the PPMY index can then be calculated as
PPMY Index = 128 / 16,686 / 16 * 1000 = 0.48.
For more information, refer to this page: A study of reliability comparison across Lincoln MKZ model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Lincoln MKZ in 2009.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 |
When making the decision between buying a new or used Lincoln MKZ, the following table can be used to compare the 2009 Lincoln MKZ with the Lincoln MKZ from other model years. Note that the number of problems reported for the 2009 MKZ is 128 while the average number of problems reported for the 15 model years of the Lincoln MKZ is 124.