Audi A8 owners have reported a total of 129 problems for their cars built in the 20 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 A8. The 2004 Audi A8 cars have the most problems reported (23 problems).
The following chart shows the 20 most common problems for Audi A8 cars. The number one most common problem is related to the vehicle's vehicle speed control (16 problems). The second most common problem is related to the vehicle's electrical system (14 problems).
|Problem Category||Number of Problems|
|Vehicle Speed Control|
|Engine And Engine Cooling|
|Other Fuel System|
|Gasoline Fuel System|
|Electronic Stability Control|
It would not be fair to compare the Audi A8 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 A8 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 A8 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.