Audi TT owners have reported a total of 322 problems for their cars built in the 13 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 Audi TT. The 2001 Audi TT cars have the most problems reported (119 problems).
The following chart shows the 22 most common problems for Audi TT cars. The number one most common problem is related to the vehicle's electrical system (139 problems). The second most common problem is related to the vehicle's power train (38 problems).
|Problem Category||Number of Problems|
|Engine And Engine Cooling|
|Gasoline Fuel System|
|Show morefewer problems...|
|Other Fuel System|
|Vehicle Speed Control|
|Unknown Or Other|
|Electronic Stability Control|
It would not be fair to compare the Audi TT 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 TT 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 Audi TT 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 Audi TT 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|