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2010 Auto Reliability Ratings and Reliability Rankings

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The Early 2010 Reliability Grade Point Averages and Grades for Lines/Brands of Automobiles
by James Bleeker

Photograph of a 2005 Honda Accord on 18 September 2010

The 4-cylinder 2005 4-door Honda Accord 
The 4-cylinder Honda Accord has a 2010 Auto Reliability GPA of 3.81 over its 10-year data history and has helped the Honda line place first among all automobile lines in the Early 2010 Auto Reliability Grade Point Averages. See the table below.

This page provides detailed 2010 auto brand reliability ratings and auto brand reliability rankings in a reorderable table. It expresses the auto brand reliability ratings and auto brand reliability rankings, and makes available brand reliability comparisons and brand reliability contrasts, using the Auto Reliability Grade Point Average, or Auto Reliability GPA. This auto reliability index is used as it is an easy-to-understand auto reliability measure, and is well known to nearly all persons having attended high school. The page also employs Auto Reliability Grades as a reliability index, as this measure of auto reliability differences is well known to all persons having attended elementary school. The Auto Reliability GPA is an automobile reliability statistic that is obtained from Consumer Reports' auto reliability survey data summarized in the reliability tables of Consumer Reports: New Car Buying Guide: 2010 and the April 2010 issue of the Consumer Reports magazine. Column reordering on this page is Ajax enabled to make for a convenient and easy-to-use reordering option.

The Average GPA for each car brand is the average of the Average GPAs of its models. The Average Minimum GPA for each car brand is the average of the Minimum GPAs of its models. The Reliable Two, Toyota Motor Corporation and Honda Motor Company, appear first in the table, because of their rather singular stature; the remaining manufacturers are listed alphabetically.

Letter grades corresponding to Average GPAs and Average Minimum GPAs are determined thusly: A if the GPA is 3.50 to 4.00, B if the GPA is 2.50 to 3.49, C if the GPA is 1.50 to 2.49, D if the GPA is 0.50 to 1.49, and F if the GPA < 0.50.

GPAs for 4 age ranges are given so that the visitor may examine more thoroughly the age range that is of greater interest to him/her, if such there be.

To arrange any column in ascending order (smallest value on top), click the header of the column. Arranging a reliability GPA or Grade column in ascending order will place the lowest reliability values and least reliable auto lines at the top (after those with empty cells) and the highest reliability values and most reliable auto lines at the bottom of the table. To rearrange any column in descending order (largest value on top), click the header one more time. Arranging a reliability GPA or Grade column in descending order will place the highest reliability values and most reliable auto lines at the top.

The 2010 Early Reliability Grade Point Averages for Lines of Motor Vehicles for Four 4-Year Age Ranges

IDAuto ManufacturerLineLine GPA for 0-to-4 Year Old VehiclesLine GPA for 2-to-6 Year Old VehiclesLine GPA for 4-to-8 Year Old VehiclesLine GPA for 6-to-10 Year Old VehiclesAverage GPAGrade Based on AverageAverage Minimum GPAGrade Based on Average MinimumAverage Number of Model Years of Data
41ToyotaScion3.433.593.70 3.56A3.31B6.25
78BMWMini Cooper1.000.751.381.001.14D0.92D5.33
124DaimlerSmart ForTwo1.00   1.00D1.00D2.00
177General MotorsBuick1.791.962.00 1.78C1.75C3.33
183General MotorsCadillac0.881.281.601.501.25D0.78D5.40
201General MotorsChevrolet1.301.121.382.021.37D1.06D6.29
210General MotorsGMC0.981.001.612.291.25D0.76D7.13
212General MotorsHummer0.671.00  0.83D0.67D3.00
218General MotorsPontiac1.431.462.33 1.53C1.37D3.80
221General MotorsSaab1.831.130.631.131.18D0.63D8.50
226General MotorsSaturn1.481.582.00 1.49D1.06D3.25
255Land RoverLand Rover0.330.250.00 0.17F0.00F1.33
317SuzukiSuzuki2.502.50  2.50B2.50B1.50

Notice that Toyota and Honda lines dominate the upper end of the reliability spectrum for all age ranges.

Caution      When the average number of model years of data (appearing in the far right column) for a line is small, the reliability GPAs of that line may be less reflective of the line's quality. For example, General Motors Corporation changes model names rather often; consequently, there is more limited information in the higher age ranges.

Note      General Motors' efforts to dump the Hummer, Pontiac, Saab, and Saturn lines appear to have been well justified. However, the above numbers suggest that an attempt to dump the Cadillac, Chevrolet, and GMC lines may be equally well justified.

Disclosure      Site manager is currently a very small shareholder of Ford Motor Company (2010-04-27). I am not, and have not been, a shareholder of any other motor vehicle manufacturer.

A PDF version of this page is available for downloading and/or printing. As the quality standing of each auto manufacturer changes slowly over time, the PDF file may be passed down as a family heirloom for generations to come.

Note      Although this site was created using software by Microsoft, you may encounter difficulty in downloading a PDF file from this page using Internet Explorer. However, with Mozilla Firefox, there should be no difficulty, and the download should be speedy.  Also, with the Mozilla Firefox browser you will avoid IE's occasional distortion of visual elements.

The method of computation of the GPAs is probably familiar to nearly every college, technical school, and high school student. A Grade Point of 4.00 (that is, an A) is given to a Consumer Reports "Much Better Than Average" reliability rating, a GP of 3.00 (that is, a B) is given to a CR "Better Than Average" reliability rating, a GP of 2.00 (that is, a C) to an "Average" reliability rating, a GP of 1.00 (that is, a D) to a "Worse Than Average" reliability rating, and a GP of 0.00 (that is, an F) to a "Much Worse Than Average" reliability rating. A Grade Point Average (GPA) is an average of the Grade Points and is computed using Microsoft's Average(a:b,[c:d],...) function.

The table is an immediate import from Microsoft's Access and a more distant import from Microsoft's Excel. The integration of the Access database into Microsoft's Web Expression software makes the reordering of the columns a rather simple task. For Ajax's partial post back, the ScriptManager and UpdatePanel controls were inserted by dragging; <ContentTemplate> was manually inserted into the code immediately after the ScriptManager and Update controls.

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