Hyundai Sonata - Problems, Statistics, and Analysis

Hyundai Sonata owners have reported a total of 13,503 problems for their cars built in the 24 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 (3,649 problems).

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

🔍 Common problems of Hyundai Sonata

The following chart shows the 29 most common problems for Hyundai Sonata cars. The number one most common problem is related to the vehicle's engine and engine cooling (2,077 problems). The second most common problem is related to the vehicle's steering (1,862 problems).

Table 2. Common problems of Hyundai Sonata

Problem Category Number of Problems
  Engine And Engine Cooling
2,077
  Steering
1,862
  Air Bag
1,709
  Electrical System
1,110
  Service Brakes
827
  Structure
806
  Equipment
725
  Exterior Lighting
634
  Suspension
573
  Power Train
554
   
  Visibility
540
  Seat Belt
419
  Vehicle Speed Control
406
  Electronic Stability Control
343
  Other Fuel System
271
  Wheel
155
  Gasoline Fuel System
113
  Tire
102
  Latches/locks/linkage
84
  Unknown Or Other
81
  Seats
78
  Traction Control System
9
  Air Brake
6
  Parking Brake
6
  Child Seat
5
  Hybrid Propulsion System
4
  Interior Lighting
2
  Back Over Prevention
1
  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 127129,6532    
0.49
  2017 154151,8313    
0.34
  2016 187165,3994    
0.28
  2015 586242,1325    
0.48
  2014 428132,5076    
0.54
  2013 1,316287,9127    
0.65
  2012 1,381179,1908    
0.96
  2011 3,649289,9679    
1.40
  2010 35777,24210    
0.46
  2009 526159,85511    
0.30
  2008 50197,99512    
0.43
  2007 817125,18013    
0.50
  2006 1,303171,09414    
0.54
  2005 20279,94915    
0.17
  2004 244102,00716    
0.15
  2003 22876,19917    
0.18
  2002 39278,55518    
0.28
  2001 28746,27719    
0.33
  2000 37349,49620    
0.38

📊 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
  2019 Sonata
16
  2018 Sonata
32
  2017 Sonata
38
  2016 Sonata
42
  2015 Sonata
98
  2014 Sonata
42
  2013 Sonata
98
  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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