Hyundai Sonata - Problems, Statistics, and Analysis

Hyundai Sonata owners have reported a total of 11,704 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 Hyundai Sonata. The 2011 Hyundai Sonata cars have the most problems reported (3,272 problems).

Table 1. Total number of problems by model year for Hyundai Sonata

  Common problems of Hyundai Sonata

The following chart shows the 28 most common problems for Hyundai Sonata cars. The number one most common problem is related to the vehicle's steering (1,684 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,671 problems).

Table 2. Common problems of Hyundai Sonata

Problem Category Number of Problems
  Steering
1,684
  Engine And Engine Cooling
1,671
  Air Bag
1,560
  Electrical System
909
  Structure
756
  Service Brakes
734
  Equipment
590
  Visibility
528
  Suspension
522
  Exterior Lighting
478
   
  Power Train
461
  Seat Belt
357
  Vehicle Speed Control
346
  Electronic Stability Control
285
  Other Fuel System
206
  Wheel
140
  Gasoline Fuel System
109
  Tire
101
  Latches/locks/linkage
84
  Unknown Or Other
81
  Seats
71
  Traction Control System
8
  Air Brake
6
  Parking Brake
6
  Child Seat
5
  Hybrid Propulsion System
3
  Interior Lighting
2
  Diesel Fuel System
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Hyundai Sonata 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 Sonata 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 Hyundai Sonata 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 Sonata Model Years

Sonata
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2018 4484,5641    
0.52
  2017 63151,8312    
0.21
  2016 114165,3993    
0.23
  2015 410242,1324    
0.42
  2014 286132,5075    
0.43
  2013 988287,9126    
0.57
  2012 1,097179,1907    
0.87
  2011 3,272289,9678    
1.41
  2010 33277,2429    
0.48
  2009 479159,85510    
0.30
  2008 47097,99511    
0.44
  2007 777125,18012    
0.52
  2006 1,255171,09413    
0.56
  2005 19179,94914    
0.17
  2004 226102,00715    
0.15
  2003 22676,19916    
0.19
  2002 39178,55517    
0.29
  2001 28446,27718    
0.34
  2000 37149,49619    
0.39

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Hyundai Sonata 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 Sonata
26
  2017 Sonata
35
  2016 Sonata
42
  2015 Sonata
97
  2014 Sonata
42
  2013 Sonata
97
  2012 Sonata
90
  2011 Sonata
391
  2010 Sonata
28
  2009 Sonata
26
  2008 Sonata
32
  2007 Sonata
49
  2006 Sonata
81
  2005 Sonata
16
  2004 Sonata
9
  2003 Sonata
19
  2002 Sonata
30
  2001 Sonata
25
  2000 Sonata
36
  1999 Sonata
14
  1998 Sonata
1
  1997 Sonata
3
  1996 Sonata
4


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