64 problems have been reported for the 2009 Audi A3. The following chart shows the 12 most common problems for 2009 Audi A3. The number one most common problem is related to the vehicle's air bags with 22 problems. The second most common problem is related to the vehicle's power train (12 problems).
| Problem Category | Number of Problems |
|---|---|
| Air Bag | |
| Power Train | |
| Service Brakes | |
| Engine And Engine Cooling | |
| Electrical System | |
| Electronic Stability Control | |
| Equipment | |
| Exterior Lighting | |
| Vehicle Speed Control | |
| Structure | |
| Air Brake | |
| Other Fuel System |
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 Audi A3 in the United States are 3,731 units [1]. If the total number of problems reported by Audi A3 owners in the last 13 years is 64, and the age of the vehicle is 13, the PPMY index can then be calculated as
PPMY Index = 64 / 3,731 / 13 * 1000 = 1.32.
For more information, refer to this page: A study of reliability comparison across Audi A3 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2009 Audi A3 in 2009.
| Service Year | Number of Problems |
|---|---|
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 |
When making the decision between buying a new or used Audi A3, the following table can be used to compare the 2009 Audi A3 with the Audi A3 from other model years. Note that the number of problems reported for the 2009 A3 is 64 while the average number of problems reported for the 18 model years of the Audi A3 is 52.