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Asher
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Calgary, Alberta
Nov 1999 time: 22:18
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Another metric that site uses is their Reliability Index:
quote:
To generate the reliability index value for a motor vehicle model, the 1996-1998 Buying Guides by the Consumers Union and the April 1998, the April 1999, the April 2000, the April 2001, the April 2002, the April 2003, and the April 2004 issues of Consumer Reports were used. In the “Reliability Records” portion of the 1996 Buying Guide appear charts for many of the motor vehicle models sold in the U.S. In each model chart, each of 16 trouble spots is rated for each of eight years, from 1987 through 1994. To compute an index value for a motor vehicle model manufactured in the years of 1987-1988, the following was done:
1. The trouble spots of “Manual Transmission,” “Clutch,” “Brakes” and “Exhaust” were eliminated. The first two were eliminated as most vehicles of any description come with automatic transmission, by far the more popular choice. The latter two were eliminated as it seemed nearly impossible to imagine that brake work today is anything other than replacement of brake linings/pads and exhaust work is simply replacement of muffler and/or exhaust pipes, something that now carries a lifetime warranty, although the author’s imagination may be somewhat limited by his rather exclusive use of Toyota motor vehicles for the past nearly 18 years.
2. If any of Consumer Reports ratings for the remaining 12 trouble spots were missing (due to insufficient data) for either of the two years, the model received no index value. Otherwise, the trouble spots in the chart that earned Consumer Reports’ lowest rating (highest frequency of reported car problems) in either of the two model years were counted and this count was multiplied by –1. Then the trouble spots in the chart that earned Consumer Reports’ second lowest rating (second highest frequency of reported car problems) in either of the two model years were counted and this count was multiplied by – ½. Then the trouble spots that earned Consumer Reports’ highest rating (lowest frequency of reported car problems) in either of the two model years were counted and this count was multiplied by +1. Then the trouble spots that earned Consumer Reports’ second highest rating (second lowest frequency of reported car problems) in either of the two model years were counted and this count was multiplied by + ½.
3. Finally, the four numbers that were obtained in 2 were added together and divided by 24. This is the model’s Reliability Index Value for the pair of manufacturing years 1987-1988.
So, the index value for a model manufactured in the years of 1987-1988 may vary from +1, the highest value, to –1, the lowest value. |
Reliability index values for 6.5 - 7.5 year old vehicles:

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