Toyota Scion Xa - Problems, Statistics, and Analysis

Toyota Scion Xa owners have reported a total of 125 problems for their cars built in the 3 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 Xa. The 2006 Toyota Scion Xa cars have the most problems reported (65 problems).

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

Model Year Number of Problems
  2006 Scion Xa
65
  2005 Scion Xa
42
  2004 Scion Xa
18

  Common problems of Toyota Scion Xa

The following chart shows the 21 most common problems for Toyota Scion Xa cars. The number one most common problem is related to the vehicle's air bags (17 problems). The second most common problem is related to the vehicle's engine and engine cooling (15 problems).

Table 2. Common problems of Toyota Scion Xa

Problem Category Number of Problems
  Air Bag
17
  Engine And Engine Cooling
15
  Gasoline Fuel System
11
  Electrical System
11
  Vehicle Speed Control
9
  Service Brakes
8
  Tire
8
  Visibility
6
  Equipment
5
  Seat Belt
5
   
  Power Train
4
  Unknown Or Other
4
  Other Fuel System
4
  Exterior Lighting
4
  Steering
3
  Seats
3
  Latches/locks/linkage
2
  Structure
2
  Air Brake
2
  Suspension
1
  Wheel
1

  Compare Reliability Across Model Years Using PPMY Index

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

Scion Xa
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2006 6555,50712    
0.10
  2005 4232,13213    
0.10
  2004 1814,75314    
0.09


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