The Car Manufacturer Quality Ratings in 2010

The Car Manufacturer Quality Ratings in 2010

This page provides two rankings of the car manufacturers with more significant sales in North America from model years 2004 to 2009. Each ranking employs a different method of computation.

The statistics used in the computations for rating and ranking the car makers are those found within the April 2010 issue of Consumer Reports. The two sections providing the necessary statistics are CR's Worst-Cars list and its reliability charts. Reliability is defined by the magazine as the infrequency of serious problems, which it measures annually by a subscriber survey.

The first ranking of the car makers is based on each manufacturer's infrequency of trouble-prone models. This ranking provides a measure of how well each manufacturer's models successfully avoided the bottom end of the model-quality spectrum.

The second ranking of the car makers is based on the average of the overall reliability ratings of each manufacturer's models. The second ranking provides a measure of how well a manufacturer's models performed over the entire model-quality spectrum.

Manufacturer Quality by Infrequency of Trouble-Prone Models

To form a car-manufacturer quality measure from the 2010 list of Worst Cars, the first step is to count each manufacturer's entries on the list. Each model year of each model is treated as a separate entry.

Next, as the number of automobile models sold by a car manufacturer varies greatly from maker to maker, it is necessary to take account of the fact that a manufacturer with more models has a greater opportunity to have more model years of low quality. To compensate for a possibly inflated, or deflated, frequency of trouble-prone model years of a manufacturer, as well as a variability in model data sufficiency, the number of a manufacturer's entries in CR's 2010 Worst-Cars list is divided by the total number of overall reliability ratings for the manufacturer found in the reliability charts of the same issue of Consumer Reports. The overall reliability ratings are found in the Used-Car-Verdicts row of the 2010 reliability charts.

By the method of computation, this quality measure begins with 0 and may run to a value some greater than 1. The value of 0 is the highest quality rating attainable by a car manufacturer and is achieved only when a manufacturer has no entry on the Worst-Cars list.

The quality ranking of the car manufacturers by the foregoing computations, together with their quality ratings, are given in the bar graph below. Only those manufacturers with at least 5 overall CR reliability ratings are included.

Bar Graph Depicting Car Manufacturer Quality Ratings in 2010 by Infrequency of Trouble Prone Cars by James Benjamin Bleeker.

In 2010, the Top 5 car manufacturers by this measure of quality were, in descending order (best first), Honda Motor Company, Toyota Motor Corporation, Hyundai Motor Company, Fuji Heavy Industries Ltd. (maker of the Subaru), and Mazda Motor Corporation, and the Bottom 5 manufacturers, in ascending order (worst first), were General Motors Corporation, BMW AG, Chrysler Group LLC, Volkswagen AG, and Saab. Saab is listed separately from General Motors as the division was sold to Spyker Cars N.V. in 2010.

Manufacturer Quality by the Average of Overall Reliability Ratings

To compute car-maker quality ratings and assemble a quality ranking using Consumer Reports' overall reliability ratings, a number is associated with each rating. 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 manufacturer's model years and models offering an overall reliability rating. CR's 2010 overall reliability ratings are found in the Used-Car-Verdicts row of its reliability charts.

For this measure of quality, the range is from -1.0 (the worst possible) to +1.0 (the best possible).

The quality ranking of the car manufacturers by this set of computations, together with their quality ratings, are given in the bar graph below. Only those manufacturers with at least 5 overall CR reliability ratings are included.

Bar Graph Depicting Car Manufacturer Quality Ratings in 2010 by Average of Overall Reliability Ratings. Bar Chart by James B. Bleeker.

In 2010, the Top 5 car manufacturers by this measure of quality were, in descending order (best first), Toyota Motor Corporation, Honda Motor Company, Fuji Heavy Industries Ltd. (maker of the Subaru), Mazda Motor Corporation, and Hyundai Motor Company, and and the Bottom 5 manufacturers, in ascending order (worst first), were Chrysler Group LLC, Saab, General Motors Corporation, Volkswagen AG, and BMW AG.

Summary

The Top 5 of both lists are the same (although the order is slightly diferent):

  • Toyota 
  • Honda
  • Fuji Heavy Industries (Subaru)
  • Mazda
  • Hyundai

The Bottom 5 of both lists are the same (although here too the order is slightly different):

  • Chrysler Group
  • Saab
  • General Motors
  • Volkswagen
  • BMW
Additional Resources
 
For additional auto quality information, visit:
and for a Kindle ebook offering anywhere, anytime access to Auto Reliability GPAs and Grades, see:
CarsOnInfo.net: The car-quality website for the above-average consumer.
 
One of the several Kindle E-books by site creator and manager, Jim Bleeker:

AutoOnInfo.net’s Car Quality Series Volume 2: Brand Quality for Model Years 1985 to 2006 and Effect on Brand Market Shares from 1985 to 2009

AutoOnInfo.net's Car Quality Series, Volume 2: Brand Quality for Model Years 1985 to 2006 and Effect on Brand Market Shares from 1985 to 2009

This volume of AutoOnInfo.net’s car guide series offers consumers and researchers an historical summary of the reliability and durability of car and truck brands and examines how these brands have fared in their U.S. market shares. It uses 6-year-old model entries in Consumer Reports’ Used Car to Avoid – also termed Vehicles to Avoid and Worst Cars, Year by Year – and CR’s reliability charts to ascribe quality grades to automobile brands for model-year groups 1985 to 1989, 1990 to 1994, 1995 to 1999, 2000 to 2004, 2005 to 2006, and 1985 to 2006. In addition to ascribing quality grades to each brand, it provides a chart that plots the number of the brand’s 6-year-old model entries in CR’s vehicles to avoid. To examine the effect that a brand’s reliability and durability has had on sales, two or more charts depicting the brand’s U.S. market shares for calendar years 1985 to 2009 are given. These grades and charts and the author’s comments impart an historical perspective that sheds light on the present condition of surviving vehicle lines and their future prospects, individual and institutional shortcomings, and what effect these may have on the U.S.

JB

The_50_Best_Cars_and_The_100_Worst_Cars_in_America_in_2013

Hard Copy Books by James Bleeker available on www.blurb.com

Icon of Blurb.com Edition of Volume 2 of AutoOnInfo.net's Car Quality Series: Brand Quality for Model Years 1985 to 2006 and Effect on Brand Market Shares from 1985 to 2009
Icon of Blurb.com Edition of Volume 3 of AutoOnInfo.net's Car Quality Quality Series: 2012 Reliability GPAs and Grades of the 6-to-10-Year-Old Cars and Trucks from Model Years 2002 to 2005
Icon of Blurb.com Edition of Volume 4 of AutoOnInfo.net's Car Quality Series: The 50 Best Cars in America in 2013
Icon of Blurb.com Edition of Volume 5 of AutoOnInfo.net's Car Quality Series: The 100 Worst Cars in America in 2013

To the left are the icons of the hard copy editions of Volumes 2, 3, 4, and 5 of AutoOnInfo.net's Car Quality Series. To view a description of the book on blurb.com or purchase a copy, click the applicable icon.

JB

The_50_Best_Cars_and_The_100_Worst_Cars_in_America_in_2013

Kindle E-books by James Bleeker available on www.amazon.com

Icon for Kindle Edition of Volume 1 of AutoOnInfo.net's Car Quality Series: The 2009 Reliability GPAs and Grades of the 6-to-10-Year-Old Cars and Trucks from Model Years 1999 to 2002
Icon of Kindle E-book edition of Volume 2 of AutoOnInfo.net's Car Quality Series: Brand Quality for Model Years 1985 to 2006 and Effect on Brand Market Shares from 1985 to 2009
Icon of Kindle E-book edition of Volume 3 of AutoOnInfo.net's Car Quality Series: 2012 Reliability GPAs and Grades of the 6-to-10-Year-Old Cars and Trucks from Model Years 2002 to 2005
Icon of the Kindle E-book edition of Volume 4 of AutoOnInfo.net's Car Quality Series: The 50 Best Cars in America in 2013

To the left are icons of the Kindle editions of Volumes 1, 2, 3, and 4, of AutoOnInfo.net's Car Quality Series. To view a description of the book on amazon.com or purchase a copy, click the applicable icon. To view all, click here.

JB
Icon of Kindle E-book edition of Volume 5 of AutoOnInfo.net's Car Quality Series: The 100 Worst Cars in America in 2013
Volume 6 of AutoOnInfo.net’s Car Quality Series is intended primarily as an aid to consumers in selecting a vehicle that both is reliable in the short term and provides a prospect of only modest repairs in the long term, and secondarily as an aid to auto industry analysts and reporters. To this end, it provides a list of the 50 Best Cars available in the U.S. in 2014 using the Overall Reliability GPA, AutoOnInfo.net’s standard measure of reliability now for several years, covering model years 2002 to 2013 for ranking pickup trucks, sport-utility vehicles (SUVs), family cars, wagons, small cars, hatchbacks, sport/sporty cars, coupes, convertibles, upscale cars, luxury cars, and hybrids, and includes each car’s reliability GPA and grade and the number of model years upon which the GPA and grade are based. As a further aid, it includes 2014 brand and manufacturer GPAs for comparison and contrast and for better assessing long term performance and ownership expenses. In addition, it offers more than 30 full color charts depicting each brand’s and car company’s share of the 10, 20, 30, 40, and 50 Best Cars and each brand’s and auto maker’s share of the best pickups, best midsize sport-utility vehicles, best small SUVs, best family cars, best wagons, best small cars, best hatchbacks, best sport/sporty cars, best coupes, best convertibles, best upscale cars, best luxury cars, and best hybrids in America. For further study and better understanding of auto quality in North America, it offers 10 charts that display, using a bar graph with an axis value of 2.00 (for quick viewing of how much above or below average a brand’s or auto maker’s  Reliability GPA falls), the 2014, 2013, 2012, 2011, and 2010 Reliability Grade Point Averages of each major brand and manufacturer, as well as a line graph plotting the 2010 to 2014 Reliability GPA ranks of the 6 most prominent manufacturers by U.S. sales.
The 100 Worst Cars in America in 2014 offers lists of the worst cars and trucks available in the U.S. It uses AutoOnInfo.net’s Overall Reliability GPA covering model years 2002 to 2013 for ranking pickup trucks, sport-utility vehicles (SUVs), minivans, family cars, wagons, small cars, hatchbacks, sport/sporty cars, coupes, convertibles, upscale cars, and luxury cars in order to aid consumers in avoiding a vehicle that may require a larger number of repairs and a greater number of expensive repairs. To this end, it includes each car’s reliability GPA and grade and the number of model years upon which the GPA and grade are based, as well as brand and manufacturer GPAs for comparison and contrast and for better assessing long term performance and ownership expenses.   In addition, it is offered as an aid to auto news reporters and auto analysts for better understanding and assessing the differences and changes in brand and auto manufacturer product quality and sales.  Further to assist consumers, reporters, and analysts in better understanding auto quality in North America, it offers 10 color charts that display, using a bar graph with an axis value of 2.00 (for quick viewing of how much above or below average a brand’s or auto maker’s  Reliability GPA falls), the 2014, 2013, 2012, 2011, and 2010 Reliability Grade Point Averages of each major brand and manufacturer, as well as a line graph plotting the 2010 to 2014 Reliability GPA ranks of the 6 most prominent manufacturers by U.S. current sales.

To the left is an icon of the Kindle edition of Volumes 5, 6, and 7 of AutoOnInfo.net's Car Quality Series. To view a description of the book on amazon.com or purchase a copy, click the applicable icon. To view all, click here.

JB

The_50_Best_Cars_and_The_100_Worst_Cars_in_America_in_2013

Pdf Editions of Books by James Bleeker available on www.scribd.com 

Icon of Kindle E-book edition of Volume 2 of AutoOnInfo.net's Car Quality Series: Brand Quality for Model Years 1985 to 2006 and Effect on Brand Market Shares from 1985 to 2009
Icon of the Kindle E-book edition of Volume 4 of AutoOnInfo.net's Car Quality Series: The 50 Best Cars in America in 2013
Icon of Kindle E-book edition of Volume 5 of AutoOnInfo.net's Car Quality Series: The 100 Worst Cars in America in 2013

To the left are icons of the pdf editions of Volumes 2, 4, and 5 of AutoOnInfo.net's Car Quality Series. To view a description of the book on scribd.com or download a copy, click the applicable icon. The pdf editions of Volumes 4 and 5 are available at no charge.

Volume 6 of AutoOnInfo.net’s Car Quality Series is intended primarily as an aid to consumers in selecting a vehicle that both is reliable in the short term and provides a prospect of only modest repairs in the long term, and secondarily as an aid to auto industry analysts and reporters. To this end, it provides a list of the 50 Best Cars available in the U.S. in 2014 using the Overall Reliability GPA, AutoOnInfo.net’s standard measure of reliability now for several years, covering model years 2002 to 2013 for ranking pickup trucks, sport-utility vehicles (SUVs), family cars, wagons, small cars, hatchbacks, sport/sporty cars, coupes, convertibles, upscale cars, luxury cars, and hybrids, and includes each car’s reliability GPA and grade and the number of model years upon which the GPA and grade are based. As a further aid, it includes 2014 brand and manufacturer GPAs for comparison and contrast and for better assessing long term performance and ownership expenses. In addition, it offers more than 30 full color charts depicting each brand’s and car company’s share of the 10, 20, 30, 40, and 50 Best Cars and each brand’s and auto maker’s share of the best pickups, best midsize sport-utility vehicles, best small SUVs, best family cars, best wagons, best small cars, best hatchbacks, best sport/sporty cars, best coupes, best convertibles, best upscale cars, best luxury cars, and best hybrids in America. For further study and better understanding of auto quality in North America, it offers 10 charts that display, using a bar graph with an axis value of 2.00 (for quick viewing of how much above or below average a brand’s or auto maker’s  Reliability GPA falls), the 2014, 2013, 2012, 2011, and 2010 Reliability Grade Point Averages of each major brand and manufacturer, as well as a line graph plotting the 2010 to 2014 Reliability GPA ranks of the 6 most prominent manufacturers by U.S. sales.
The 100 Worst Cars in America in 2014 offers lists of the worst cars and trucks available in the U.S. It uses AutoOnInfo.net’s Overall Reliability GPA covering model years 2002 to 2013 for ranking pickup trucks, sport-utility vehicles (SUVs), minivans, family cars, wagons, small cars, hatchbacks, sport/sporty cars, coupes, convertibles, upscale cars, and luxury cars in order to aid consumers in avoiding a vehicle that may require a larger number of repairs and a greater number of expensive repairs. To this end, it includes each car’s reliability GPA and grade and the number of model years upon which the GPA and grade are based, as well as brand and manufacturer GPAs for comparison and contrast and for better assessing long term performance and ownership expenses.   In addition, it is offered as an aid to auto news reporters and auto analysts for better understanding and assessing the differences and changes in brand and auto manufacturer product quality and sales.  Further to assist consumers, reporters, and analysts in better understanding auto quality in North America, it offers 10 color charts that display, using a bar graph with an axis value of 2.00 (for quick viewing of how much above or below average a brand’s or auto maker’s  Reliability GPA falls), the 2014, 2013, 2012, 2011, and 2010 Reliability Grade Point Averages of each major brand and manufacturer, as well as a line graph plotting the 2010 to 2014 Reliability GPA ranks of the 6 most prominent manufacturers by U.S. current sales.

To the left are icons of the pdf editions of Volumes 6 and 7 of AutoOnInfo.net's Car Quality Series. To view a description of the book on scribd.com or download a copy, click the applicable icon. The pdf edition of Volume 7 is available at no charge. Volumes 6 and 7 have enhanced navigational capability as well as an improved page style.

JB