Chevrolet Impala - Problems, Statistics, and Analysis

Chevrolet Impala owners have reported a total of 11,481 problems for their cars built in the 23 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 Chevrolet Impala. The 2004 Chevrolet Impala cars have the most problems reported (1,209 problems).

Table 1. Total number of problems by model year for Chevrolet Impala

  Common problems of Chevrolet Impala

The following chart shows the 29 most common problems for Chevrolet Impala cars. The number one most common problem is related to the vehicle's electrical system (2,849 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,547 problems).

Table 2. Common problems of Chevrolet Impala

Problem Category Number of Problems
  Electrical System
2,849
  Engine And Engine Cooling
1,547
  Steering
875
  Air Bag
714
  Service Brakes
689
  Power Train
658
  Equipment
637
  Electronic Stability Control
615
  Exterior Lighting
538
  Vehicle Speed Control
510
   
  Suspension
304
  Visibility
209
  Structure
191
  Other Fuel System
186
  Wheel
170
  Gasoline Fuel System
135
  Seats
131
  Traction Control System
117
  Tire
116
  Seat Belt
109
  Unknown Or Other
88
  Latches/locks/linkage
63
  Parking Brake
10
  Child Seat
6
  Air Brake
6
  Interior Lighting
4
  Back Over Prevention
2
  Lane Departure
1
  Diesel Fuel System
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Chevrolet Impala 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 Impala 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 Chevrolet Impala 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 Impala Model Years

Impala
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2018 846,1271    
0.17
  2017 3779,5252    
0.23
  2016 4693,2173    
0.16
  2015 123118,0604    
0.26
  2014 365191,1615    
0.38
  2013 345131,7986    
0.44
  2012 305172,1037    
0.25
  2011 661177,6248    
0.47
  2010 600157,5189    
0.42
  2009 1,151192,92610    
0.60
  2008 1,035332,84011    
0.28
  2007 759281,01012    
0.23
  2006 691274,52513    
0.19
  2005 706243,11114    
0.21
  2004 1,209279,78915    
0.29
  2003 782256,32916    
0.19
  2002 881201,46817    
0.26
  2001 793188,24818    
0.23
  2000 886199,32119    
0.23

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Chevrolet Impala 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
  2018 Impala
7
  2017 Impala
12
  2016 Impala
13
  2015 Impala
35
  2014 Impala
82
  2013 Impala
6
  2012 Impala
22
  2011 Impala
66
  2010 Impala
28
  2009 Impala
29
  2008 Impala
43
  2007 Impala
59
  2006 Impala
41
  2005 Impala
24
  2004 Impala
32
  2003 Impala
32
  2002 Impala
49
  2001 Impala
35
  2000 Impala
82
  1999 Impala
1
  1996 Impala
11


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