150 problems have been reported for the 2000 Audi A6.
The following chart shows the 18 most common problems for 2000 Audi A6.
The number one most common problem is related to the vehicle's electrical system
with 35 problems.
The second most common problem is related to the vehicle's service brakes, hydraulic
(26 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 2000 Audi A6 in the United States are 26,292 units [1]. If the total number of problems reported by Audi A6 owners in the last 19 years is 150, and the age of the vehicle is 19, the PPMY index can then be calculated as

The following chart shows the number of problems reported during each of the service
years since the debut of the 2000 Audi A6 in 2000.

Table 2. PPMY Index and Problem Occurrence Trend

Service Year

Number of Problems

2019

0

2018

0

2017

1

2016

2

2015

4

2014

1

2013

3

2012

4

2011

5

2010

6

2009

7

2008

8

2007

17

2006

13

2005

8

2004

19

2003

11

2002

6

2001

6

2000

2

Compare the 2000 Audi A6 with Other Model Years

When making the decision between buying a new or used Audi A6,
the following table can be used to compare the 2000 Audi A6
with the Audi A6 from other model years.
Note that the number of problems reported for the 2000 A6 is 150
while the average number of problems reported for the 23 model years of the Audi A6 is 62.

Table 3. Compare the 2000 Audi A6 with other model years