Chevrolet Metro - Problems, Statistics, and Analysis

Chevrolet Metro owners have reported a total of 14 problems for their cars built in the 4 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 Chevrolet Metro. The 1998 Chevrolet Metro cars have the most problems reported (6 problems).

Table 1. Total number of problems by model year for Chevrolet Metro

Model Year Number of Problems
  2000 Metro
3
  1999 Metro
4
  1998 Metro
6
  1997 Metro
1

  Common problems of Chevrolet Metro

The following chart shows the 7 most common problems for Chevrolet Metro cars. The number one most common problem is related to the vehicle's structure (6 problems). The second most common problem is related to the vehicle's engine and engine cooling (3 problems).

Table 2. Common problems of Chevrolet Metro

Problem Category Number of Problems
  Structure
6
  Engine And Engine Cooling
3
  Equipment
1
  Electrical System
1
  Vehicle Speed Control
1
  Gasoline Fuel System
1
  Air Bag
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Chevrolet Metro 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 Metro 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 Chevrolet Metro 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 Metro Model Years

Metro
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2000 330,52218    
0.01


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