Mercury Montego owners have reported a total of 352 problems for their cars built in the 4 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the Mercury Montego. The 2005 Mercury Montego cars have the most problems reported (186 problems).
| Model Year | Number of Problems |
|---|---|
| 2007 Montego | |
| 2006 Montego | |
| 2005 Montego | |
| 2004 Montego |
The following chart shows the 20 most common problems for Mercury Montego cars. The number one most common problem is related to the vehicle's power train (84 problems). The second most common problem is related to the vehicle's vehicle speed control (44 problems).
It would not be fair to compare the Mercury Montego of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across Montego model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.
PPMY = P / S / Y * 1000,
where P = total problems reported during the life of a Mercury Montego model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).
The results are shown in Table 3.
Another way to measure the reliability across the model years of the Mercury Montego is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.
| Model Year | Problems Reported |
|---|---|
| 2007 Montego | |
| 2006 Montego | |
| 2005 Montego |
| ☘ Montego Service Bulletins |
| ⚑ Montego Safety Recalls |
| ☤ Montego Defect Investigations |
| Compare Reliability: |