Mini Cooper Us owners have reported a total of 40 problems for their cars built in the 3 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 Mini Cooper Us. The 2007 Mini Cooper Us cars have the most problems reported (20 problems).
| Model Year | Number of Problems |
|---|---|
| 2011 Cooper Us | |
| 2009 Cooper Us | |
| 2007 Cooper Us |
The following chart shows the 15 most common problems for Mini Cooper Us cars. The number one most common problem is related to the vehicle's engine and engine cooling (19 problems). The second most common problem is related to the vehicle's structure (3 problems).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling | |
| Structure | |
| Power Train | |
| Vehicle Speed Control | |
| Gasoline Fuel System | |
| Electrical System | |
| Steering | |
| Visibility | |
| Interior Lighting | |
| Air Bag | |
| Tire | |
| Other Fuel System | |
| Unknown Or Other | |
| Equipment | |
| Seat Belt | |
It would not be fair to compare the Mini Cooper Us 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 Cooper Us 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 Mini Cooper Us 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.