Audi A4 - Problems, Statistics, and Analysis

Audi A4 owners have reported a total of 2,960 problems for their cars built in the 24 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the Audi A4. The 2006 Audi A4 cars have the most problems reported (332 problems).

Table 1. Total number of problems by model year for Audi A4

Model Year Number of Problems
  2019 A4
1
  2018 A4
5
  2017 A4
32
  2016 A4
14
  2015 A4
29
  2014 A4
43
  2013 A4
93
  2012 A4
35
  2011 A4
41
  2010 A4
58
  2009 A4
158
  2008 A4
205
  2007 A4
227
  2006 A4
332
  2005 A4
241
  2004 A4
188
  2003 A4
215
  2002 A4
182
  2001 A4
129
  2000 A4
94
  1999 A4
193
  1998 A4
256
  1997 A4
100
  1996 A4
89

  Common problems of Audi A4

The following chart shows the 26 most common problems for Audi A4 cars. The number one most common problem is related to the vehicle's air bags (535 problems). The second most common problem is related to the vehicle's engine and engine cooling (407 problems).

Table 2. Common problems of Audi A4

Problem Category Number of Problems
  Air Bag
535
  Engine And Engine Cooling
407
  Exterior Lighting
345
  Electrical System
331
  Service Brakes
309
  Power Train
175
  Steering
150
  Gasoline Fuel System
103
  Equipment
98
  Vehicle Speed Control
95
   
  Visibility
70
  Other Fuel System
68
  Suspension
67
  Tire
51
  Structure
33
  Seats
25
  Unknown Or Other
24
  Electronic Stability Control
17
  Air Brake
16
  Seat Belt
14
  Wheel
12
  Latches/locks/linkage
7
  Parking Brake
5
  Interior Lighting
1
  Traction Control System
1
  Back Over Prevention
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Audi A4 of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across A4 model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.

    PPMY = P / S / Y * 1000,

where P = total problems reported during the life of a Audi A4 model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).

The results are shown in Table 3.

Table 3. Use PPMY Index to Compare Reliability Across A4 Model Years

A4
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2018 520,3771    
0.25
  2017 3250,7012    
0.32
  2016 1418,4573    
0.25
  2015 2928,9934    
0.25
  2014 4337,3145    
0.23
  2013 9339,8936    
0.39
  2012 3531,5617    
0.16
  2011 4135,0798    
0.15
  2010 5830,8639    
0.21
  2009 15839,06910    
0.40
  2008 20545,41711    
0.41
  2007 22750,78112    
0.37
  2006 33247,67713    
0.54
  2005 24147,28014    
0.36
  2004 18846,70415    
0.27
  2003 21547,48716    
0.28
  2002 18238,46817    
0.28
  2001 12943,01518    
0.17
  2000 9425,04519    
0.20

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Audi A4 is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.

Table 4. Number of problems in vehicle's; first service year

Model YearProblems Reported
  2019 A4
1
  2018 A4
1
  2017 A4
14
  2016 A4
1
  2014 A4
8
  2013 A4
11
  2012 A4
2
  2011 A4
2
  2010 A4
10
  2009 A4
8
  2008 A4
5
  2007 A4
9
  2006 A4
7
  2005 A4
8
  2004 A4
23
  2003 A4
10
  2002 A4
59
  2001 A4
9
  2000 A4
16
  1999 A4
18
  1998 A4
17
  1997 A4
3
  1996 A4
3


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