Buick Terraza - Problems, Statistics, and Analysis

Buick Terraza owners have reported a total of 252 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 Buick Terraza. The 2005 Buick Terraza cars have the most problems reported (145 problems).

Table 1. Total number of problems by model year for Buick Terraza

Model Year Number of Problems
  2007 Terraza
  2006 Terraza
  2005 Terraza

  Common problems of Buick Terraza

The following chart shows the 24 most common problems for Buick Terraza cars. The number one most common problem is related to the vehicle's electrical system (52 problems). The second most common problem is related to the vehicle's electronic stability control (34 problems).

Table 2. Common problems of Buick Terraza

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Buick Terraza 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 Terraza 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 Buick Terraza 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 Terraza Model Years

Model Year
Problems Sales [1] Vehicle
PPMY Index
  2007 417,90511    
  2006 6612,76712    
  2005 14519,84813    

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Buick Terraza 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
  2007 Terraza
  2006 Terraza
  2005 Terraza

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