Chevrolet Sonic - Problems, Statistics, and Analysis

Chevrolet Sonic owners have reported a total of 846 problems for their cars built in the 8 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 Sonic. The 2012 Chevrolet Sonic cars have the most problems reported (402 problems).

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

Model Year Number of Problems
  2018 Sonic
2
  2017 Sonic
13
  2016 Sonic
23
  2015 Sonic
61
  2014 Sonic
132
  2013 Sonic
212
  2012 Sonic
402
  2011 Sonic
1

  Common problems of Chevrolet Sonic

The following chart shows the 21 most common problems for Chevrolet Sonic cars. The number one most common problem is related to the vehicle's power train (140 problems). The second most common problem is related to the vehicle's engine and engine cooling (125 problems).

Table 2. Common problems of Chevrolet Sonic

Problem Category Number of Problems
  Power Train
140
  Engine And Engine Cooling
125
  Equipment
125
  Electrical System
114
  Air Bag
84
  Service Brakes
39
  Steering
33
  Other Fuel System
32
  Suspension
27
  Electronic Stability Control
24
   
  Visibility
23
  Structure
20
  Vehicle Speed Control
18
  Exterior Lighting
12
  Seat Belt
7
  Seats
7
  Wheel
6
  Tire
5
  Traction Control System
3
  Latches/locks/linkage
1
  Unknown Or Other
1

  Compare Reliability Across Model Years Using PPMY Index

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

Sonic
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2018 27,2961    
0.27
  2017 1344,7282    
0.15
  2016 2343,4273    
0.18
  2015 6176,7414    
0.20
  2014 13283,2175    
0.32
  2013 21294,2506    
0.37
  2012 40283,9797    
0.68

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Chevrolet Sonic 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 Sonic
2
  2017 Sonic
2
  2016 Sonic
6
  2015 Sonic
13
  2014 Sonic
29
  2013 Sonic
26
  2012 Sonic
62


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