58 problems have been reported for the 2018 Audi A3. The following chart shows the 14 most common problems for 2018 Audi A3. The number one most common problem is related to the vehicle's air bags with 24 problems. The second most common problem is related to the vehicle's fuel system, other (5 problems).
| Problem Category | Number of Problems |
|---|---|
| Air Bag | |
| Other Fuel System | |
| Equipment | |
| Engine And Engine Cooling | |
| Tire | |
| Power Train | |
| Electrical System | |
| Exterior Lighting | |
| Seats | |
| Wheel | |
| Gasoline Fuel System | |
| Service Brakes | |
| Back Over Prevention | |
| Seat Belt |
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 2018 Audi A3 in the United States are 20,938 units [1]. If the total number of problems reported by Audi A3 owners in the last 7 years is 58, and the age of the vehicle is 7, the PPMY index can then be calculated as
PPMY Index = 58 / 20,938 / 7 * 1000 = 0.40.
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 2018 Audi A3 in 2018.
| Service Year | Number of Problems |
|---|---|
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 |
When making the decision between buying a new or used Audi A3, the following table can be used to compare the 2018 Audi A3 with the Audi A3 from other model years. Note that the number of problems reported for the 2018 A3 is 58 while the average number of problems reported for the 21 model years of the Audi A3 is 51.