Chevrolet Impala - Problems, Statistics, and Analysis

Chevrolet Impala owners have reported a total of 11,088 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 (1,205 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 (2,795 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,503 problems).

Table 2. Common problems of Chevrolet Impala

Problem Category Number of Problems
  Electrical System
2,795
  Engine And Engine Cooling
1,503
  Steering
838
  Air Bag
680
  Service Brakes
660
  Power Train
633
  Equipment
605
  Electronic Stability Control
564
  Exterior Lighting
528
  Vehicle Speed Control
493
   
  Suspension
295
  Visibility
203
  Structure
180
  Other Fuel System
174
  Wheel
161
  Gasoline Fuel System
135
  Seats
127
  Tire
116
  Traction Control System
116
  Seat Belt
102
  Unknown Or Other
88
  Latches/locks/linkage
62
  Parking Brake
10
  Air Brake
6
  Child Seat
6
  Interior Lighting
4
  Back Over Prevention
2
  Diesel Fuel System
1
  Lane Departure
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
  2017 1644,3281    
0.36
  2016 3793,2172    
0.20
  2015 91118,0603    
0.26
  2014 294191,1614    
0.38
  2013 324131,7985    
0.49
  2012 276172,1036    
0.27
  2011 626177,6247    
0.50
  2010 573157,5188    
0.45
  2009 1,101192,9269    
0.63
  2008 1,009332,84010    
0.30
  2007 738281,01011    
0.24
  2006 682274,52512    
0.21
  2005 695243,11113    
0.22
  2004 1,205279,78914    
0.31
  2003 776256,32915    
0.20
  2002 875201,46816    
0.27
  2001 787188,24817    
0.25
  2000 884199,32118    
0.25

  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
  2017 Impala
11
  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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