Hyundai Sonata - Problems, Statistics, and Analysis

Hyundai Sonata owners have reported a total of 11,250 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 (3,142 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 (1,625 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,550 problems).

Table 2. Common problems of Hyundai Sonata

Problem Category Number of Problems
  Steering
1,625
  Engine And Engine Cooling
1,550
  Air Bag
1,517
  Electrical System
864
  Structure
740
  Service Brakes
720
  Equipment
562
  Visibility
525
  Suspension
507
  Power Train
448
   
  Exterior Lighting
438
  Seat Belt
336
  Vehicle Speed Control
336
  Electronic Stability Control
280
  Other Fuel System
190
  Wheel
137
  Gasoline Fuel System
109
  Tire
101
  Latches/locks/linkage
83
  Unknown Or Other
81
  Seats
71
  Traction Control System
7
  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
  2017 53151,8311    
0.35
  2016 93165,3992    
0.28
  2015 392242,1323    
0.54
  2014 257132,5074    
0.48
  2013 901287,9125    
0.63
  2012 1,000179,1906    
0.93
  2011 3,142289,9677    
1.55
  2010 32877,2428    
0.53
  2009 469159,8559    
0.33
  2008 46397,99510    
0.47
  2007 772125,18011    
0.56
  2006 1,248171,09412    
0.61
  2005 19179,94913    
0.18
  2004 222102,00714    
0.16
  2003 22676,19915    
0.20
  2002 39078,55516    
0.31
  2001 28146,27717    
0.36
  2000 37149,49618    
0.42

  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
21
  2017 Sonata
35
  2016 Sonata
39
  2015 Sonata
91
  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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