Toyota Scion Tc - Problems, Statistics, and Analysis

Toyota Scion Tc owners have reported a total of 603 problems for their cars built in the 7 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 Toyota Scion Tc. The 2005 Toyota Scion Tc cars have the most problems reported (183 problems).

Table 1. Total number of problems by model year for Toyota Scion Tc

Model Year Number of Problems
  2011 Scion Tc
13
  2010 Scion Tc
14
  2009 Scion Tc
49
  2008 Scion Tc
76
  2007 Scion Tc
99
  2006 Scion Tc
169
  2005 Scion Tc
183

  Common problems of Toyota Scion Tc

The following chart shows the 24 most common problems for Toyota Scion Tc cars. The number one most common problem is related to the vehicle's visibility (115 problems). The second most common problem is related to the vehicle's structure (100 problems).

Table 2. Common problems of Toyota Scion Tc

Problem Category Number of Problems
  Visibility
115
  Structure
100
  Air Bag
57
  Engine And Engine Cooling
51
  Equipment
40
  Vehicle Speed Control
39
  Service Brakes
34
  Latches/locks/linkage
23
  Tire
22
  Steering
19
   
  Unknown Or Other
17
  Electrical System
13
  Power Train
12
  Wheel
10
  Seat Belt
9
  Exterior Lighting
9
  Suspension
8
  Other Fuel System
8
  Gasoline Fuel System
6
  Seats
3
  Parking Brake
3
  Electronic Stability Control
2
  Traction Control System
2
  Air Brake
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Toyota Scion Tc 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 Scion Tc 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 Toyota Scion Tc 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 Scion Tc Model Years

Scion Tc
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2011 1318,6377    
0.10
  2010 1419,7888    
0.09
  2009 4927,1829    
0.20
  2008 7654,83510    
0.14
  2007 9976,48811    
0.12
  2006 16980,57612    
0.17
  2005 18362,32113    
0.23

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Toyota Scion Tc 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
  2011 Scion Tc
9
  2010 Scion Tc
3
  2009 Scion Tc
12
  2008 Scion Tc
13
  2007 Scion Tc
18
  2006 Scion Tc
29
  2005 Scion Tc
37


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