116 problems have been reported for the 2001 Audi A6. The following chart shows the 20 most common problems for 2001 Audi A6. The number one most common problem is related to the vehicle's engine and engine cooling with 16 problems. The second most common problem is related to the vehicle's air bags (15 problems).
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 2001 Audi A6 in the United States are 33,896 units [1]. If the total number of problems reported by Audi A6 owners in the last 22 years is 116, and the age of the vehicle is 22, the PPMY index can then be calculated as
PPMY Index = 116 / 33,896 / 22 * 1000 = 0.16.
For more information, refer to this page: A study of reliability comparison across Audi A6 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2001 Audi A6 in 2001.
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When making the decision between buying a new or used Audi A6, the following table can be used to compare the 2001 Audi A6 with the Audi A6 from other model years. Note that the number of problems reported for the 2001 A6 is 116 while the average number of problems reported for the 26 model years of the Audi A6 is 65.