2009 Chevrolet Cobalt - Problems, Statistics, and Analysis

🔎 Common problems of the 2009 Chevrolet Cobalt

1,079 problems have been reported for the 2009 Chevrolet Cobalt. The following chart shows the 25 most common problems for 2009 Chevrolet Cobalt. The number one most common problem is related to the vehicle's fuel system, other with 238 problems. The second most common problem is related to the vehicle's steering (200 problems).

Table 1. Common problems of the 2009 Chevrolet Cobalt

Problem Category	Number of Problems
Other Fuel System	238
Steering	200
Service Brakes	157
Electrical System	141
Air Bag	77
Engine And Engine Cooling	53
Equipment	39
Power Train	29
Gasoline Fuel System	28
Parking Brake	19
Structure	14
Vehicle Speed Control	14
Wheel	13
Unknown Or Other	10
Electronic Stability Control	10
Suspension	9
Exterior Lighting	7
Tire	4
Seat Belt	4
Air Brake	3
Visibility	3
Latches/locks/linkage	2
Seats	2
Traction Control System	2
	1

📈 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 2009 Chevrolet Cobalt in the United States are 141,588 units [1]. If the total number of problems reported by Chevrolet Cobalt owners in the last 17 years is 1079, and the age of the vehicle is 17, the PPMY index can then be calculated as

PPMY Index = 1079 / 141,588 / 17 * 1000 = 0.45.

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

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

Table 2. PPMY Index and Problem Occurrence Trend

Service Year	Number of Problems
2026	1
2025	2
2024	5
2023	12
2022	23
2021	28
2020	69
2019	55
2018	95
2017	57
2016	59
2015	63
2014	167
2013	55
2012	70
2011	82
2010	107
2009	1

📊 Compare the 2009 Chevrolet Cobalt with Other Model Years

When making the decision between buying a new or used Chevrolet Cobalt, the following table can be used to compare the 2009 Chevrolet Cobalt with the Chevrolet Cobalt from other model years. Note that the number of problems reported for the 2009 Cobalt is 1,079 while the average number of problems reported for the 14 model years of the Chevrolet Cobalt is 688.

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

Model Year	Number of Problems
2017 Cobalt	1
2016 Cobalt	2
2015 Cobalt	1
2012 Cobalt	1
2011 Cobalt	2
2010 Cobalt	765
2009 Cobalt	1,079
2008 Cobalt	1,164
2007 Cobalt	1,865
2006 Cobalt	2,810
2005 Cobalt	1,949
2002 Cobalt	2
2000 Cobalt	3
1996 Cobalt	1

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