Chevrolet Impala - Problems, Statistics, and Analysis

Chevrolet Impala owners have reported a total of 11,842 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 (1,212 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 (2,938 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,586 problems).

Table 2. Common problems of Chevrolet Impala

Problem Category Number of Problems
  Electrical System
2,938
  Engine And Engine Cooling
1,586
  Steering
907
  Air Bag
739
  Service Brakes
708
  Power Train
674
  Equipment
673
  Electronic Stability Control
657
  Exterior Lighting
550
  Vehicle Speed Control
530
   
  Suspension
308
  Visibility
211
  Other Fuel System
198
  Structure
196
  Wheel
172
  Gasoline Fuel System
135
  Seats
131
  Traction Control System
119
  Tire
116
  Seat Belt
110
  Unknown Or Other
88
  Latches/locks/linkage
63
  Parking Brake
11
  Air Brake
6
  Child Seat
6
  Interior Lighting
4
  Back Over Prevention
3
  Lane Departure
2
  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 1046,1271    
0.22
  2017 4479,5252    
0.28
  2016 5393,2173    
0.19
  2015 180118,0604    
0.38
  2014 478191,1615    
0.50
  2013 365131,7986    
0.46
  2012 322172,1037    
0.27
  2011 689177,6248    
0.48
  2010 615157,5189    
0.43
  2009 1,168192,92610    
0.61
  2008 1,055332,84011    
0.29
  2007 779281,01012    
0.23
  2006 697274,52513    
0.20
  2005 713243,11114    
0.21
  2004 1,212279,78915    
0.29
  2003 788256,32916    
0.19
  2002 886201,46817    
0.26
  2001 803188,24818    
0.24
  2000 887199,32119    
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
8
  2017 Impala
12
  2016 Impala
13
  2015 Impala
35
  2014 Impala
84
  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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