2004 Chevrolet Impala - Problems, Statistics, and Analysis

small car iamge Common problems of the 2004 Chevrolet Impala

1,205 problems have been reported for the 2004 Chevrolet Impala. The following chart shows the 24 most common problems for 2004 Chevrolet Impala. The number one most common problem is related to the vehicle's electrical system with 647 problems. The second most common problem is related to the vehicle's exterior lighting (92 problems).

Table 1. Common problems of the 2004 Chevrolet Impala

small car iamge PPMY Index and Problem Occurrence Trend

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 2004 Chevrolet Impala in the United States are 279,789 units [1]. If the total number of problems reported by Chevrolet Impala owners in the last 14 years is 1205, and the age of the vehicle is 14, the PPMY index can then be calculated as

      PPMY Index = 1205 / 279,789 / 14 * 1000 = 0.31.

For more information, refer to this page: A study of reliability comparison across Chevrolet Impala model year vehicles.

The following chart shows the number of problems reported during each of the service years since the debut of the 2004 Chevrolet Impala in 2004.

Table 2. PPMY Index and Problem Occurrence Trend

Service Year Number of Problems
  2018
1
  2017
30
  2016
31
  2015
83
  2014
128
  2013
78
  2012
62
  2011
69
  2010
118
  2009
146
  2008
181
  2007
138
  2006
65
  2005
36
  2004
2

small car iamge Compare the 2004 Chevrolet Impala with Other Model Years

When making the decision between buying a new or used Chevrolet Impala, the following table can be used to compare the 2004 Chevrolet Impala with the Chevrolet Impala from other model years. Note that the number of problems reported for the 2004 Impala is 1,205 while the average number of problems reported for the 23 model years of the Chevrolet Impala is 480.

Table 3. Compare the 2004 Chevrolet Impala with other model years

Model Year Number of Problems
  2018 Impala
1
  2017 Impala
16
  2016 Impala
37
  2015 Impala
91
  2014 Impala
280
  2013 Impala
321
  2012 Impala
274
  2011 Impala
624
  2010 Impala
570
  2009 Impala
1,096
  2008 Impala
1,008
  2007 Impala
737
  2006 Impala
682
  2005 Impala
695
  2004 Impala
1,205
  2003 Impala
773
  2002 Impala
875
  2001 Impala
787
  2000 Impala
884
  1999 Impala
4
  1998 Impala
4
  1997 Impala
1
  1996 Impala
89


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