2009 Chevrolet Impala - Problems, Statistics, and Analysis

Common problems of the 2009 Chevrolet Impala

1,159 problems have been reported for the 2009 Chevrolet Impala.
The following chart shows the 23 most common problems for 2009 Chevrolet Impala.
The number one most common problem is related to the vehicle's electrical system
with 187 problems.
The second most common problem is related to the vehicle's air bags
(184 problems).

Table 1. Common problems of the 2009 Chevrolet Impala

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 2009 Chevrolet Impala in the United States are 192,926 units [1]. If the total number of problems reported by Chevrolet Impala owners in the last 10 years is 1159, and the age of the vehicle is 10, the PPMY index can then be calculated as

The following chart shows the number of problems reported during each of the service
years since the debut of the 2009 Chevrolet Impala in 2009.

Table 2. PPMY Index and Problem Occurrence Trend

Service Year

Number of Problems

2019

2

2018

68

2017

78

2016

120

2015

169

2014

283

2013

197

2012

93

2011

67

2010

53

2009

29

Compare the 2009 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 2009 Chevrolet Impala
with the Chevrolet Impala from other model years.
Note that the number of problems reported for the 2009 Impala is 1,159
while the average number of problems reported for the 23 model years of the Chevrolet Impala is 505.

Table 3. Compare the 2009 Chevrolet Impala with other model years