4 problems have been reported for the 2021 BMW M5. The following chart shows the 4 most common problems for 2021 BMW M5. The number one most common problem is related to the vehicle's fuel system, other with 1 problem. The second most common problem is related to the vehicle's exterior lighting (1 problem).
| Problem Category | Number of Problems |
|---|---|
| Other Fuel System | |
| Exterior Lighting | |
| Power Train | |
| Electrical 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 2021 BMW M5 in the United States are 1,921 units [1]. If the total number of problems reported by BMW M5 owners in the last 3 years is 4, and the age of the vehicle is 3, the PPMY index can then be calculated as
PPMY Index = 4 / 1,921 / 3 * 1000 = 0.69.
For more information, refer to this page: A study of reliability comparison across BMW M5 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2021 BMW M5 in 2021.
| Service Year | Number of Problems |
|---|---|
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 |
When making the decision between buying a new or used BMW M5, the following table can be used to compare the 2021 BMW M5 with the BMW M5 from other model years. Note that the number of problems reported for the 2021 M5 is 4 while the average number of problems reported for the 15 model years of the BMW M5 is 8.