Product Quality Ranking of the Brands of General Motors and Japan-Based Auto Manufacturers
by James Bleeker

Content Summary

This page provides two charts. The first plots the quality ranks of the brands of Toyota Motor Corporation, Toyota and Lexus, those of Honda Motor Company, Honda and Acura, and those of General Motors Corporation, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, and Saturn. The second plots the quality ranks of the Infiniti, Nissan, Subaru, Mazda, and Suzuki brands, in addition to all of those of the first chart.

The statistics used in the computations for ranking the car brands are those found within the April issues of Consumer Reports. The section providing the necessary statistics is that containing CR's reliability charts. Reliability is defined by the magazine as the infrequency of serious problems, which it measures annually by a subscriber survey.

The charts below provide the ranks of the above car brands based on the average of the overall reliability ratings of each brand's models. This ranking provides a measure of how well a brand's models performed over the entire model-quality spectrum in each of the years 1975, 1980, 1985, 1990, 1995, 2000, 2005, and 2010.

Computations: Auto Brand Quality by the Average of Overall Reliability Ratings

To compute car-brand quality ratings and compute a quality rank using Consumer Reports' overall reliability ratings, a number is first associated with each of CR's overall ratings. A +1.0 is ascribed to a rating of Much Better Than Average, a +0.5 to a rating of Better Than Average, a 0 to a rating of Average, a -0.5 to a rating of Worse Than Average, and a -1.0 to a rating of Much Worse Than Average. Then an average is taken over all of the brand's model years and models offering an overall reliability rating. Lastly, the automobile brands with at least 5 overall reliability ratings are ordered from best to worst for each of the years 1975, 1980, 1985, 1990, 2000, 2005, and 2010. The best brand in a given year has a quality rank of 1. The worst quality rank varies from year to year and ranges from 20 to 34.

Automobile brands with a rank in at least one year include Acura, AMC, Audi, BMW, Buick, Cadillac, Chevrolet, Chrysler, Datsun, Dodge, Eagle, Fiat, Ford, GMC, Honda, Hyundai, Infiniti, International Harvester, Isuzu, Jaguar, Jeep, Kia, Lexus, Lincoln, Mazda, Mercedes-Benz, Mercury, Mini Cooper, Mitsubishi, Nissan, Oldsmobile, Peugeot, Plymouth, Pontiac, Porsche, Saab, Saturn, Scion, Subaru, Suzuki, Toyota, Volkswagen, and Volvo.

The quality ranks of the above car lines by this set of computations are given in the graphs below.

As overall reliability ratings were not offered by Consumer Reports in 1995, Auto Reliability Percentrank averages were used for ranking the automobile manufacturers.

The Graphs of the Quality Ranks of the Auto Brands of Japan-Based Manufacturers and General Motors Corporation

In the graphs above, the 8-year average of each brand's ranks appears in parentheses after the brand's name, and each plot of a brand that has been off-loaded by General Motors Corporation is denoted by an x through the point.

Summary and Analysis

Important points from the foregoing graphs are:

1. General Motors' brands, denoted by square plots, have generally moved down in rank as additional brands by foreign manufacturers have come onto the North American new-car market.

2. Although nearly all of General Motors' brands are quite far from the top in 2005 and 2010, GM's decisions as to which brands to off-load and which to keep appears to have been made in abandonment of quality considerations.

3. In every one of the above years, the quality ranks of all of General Motors' brands fell below the quality ranks of all of the brands of Toyota Motor Corporation, Honda Motor Company, Nissan Motor Company, Fuji Heavy Industries Ltd. (manufacturer of the Subaru line), Mazda Motor Corporation, and Suzuki Motor Corporation.

Additional Resources

To view the quality ratings of all of the auto brands for a given year, click the applicable year.

2010  2005  2000  1995  1990  1985  1980  1975 

To view the quality ratings of the 10 best auto brands for a given year, click the applicable year.

2010  2005  2000  1995  1990  1985  1980  1975 

To view the quality ratings of the 10 worst auto brands for a given year, click the applicable year.

2010  2005  2000  1995  1990  1985  1980  1975 

For a Google Knol that summarizes the changes in auto-brand and auto-manufacturer ranking by these quality measures from 1990 to 2010, click Go.

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