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 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
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
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.
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
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
|ID||Auto Manufacturer||Line||Line GPA for 0-to-4 Year Old Vehicles||Line GPA for 2-to-6 Year Old Vehicles||Line GPA for 4-to-8 Year Old Vehicles||Line GPA for 6-to-10 Year Old Vehicles||Average GPA||Grade Based on Average||Average Minimum GPA||Grade Based on Average Minimum||Average Number of Model Years of Data
|124||Daimler||Smart ForTwo||1.00|| || || ||1.00||D||1.00||D||2.00
|177||General Motors||Buick||1.79||1.96||2.00|| ||1.78||C||1.75||C||3.33
|212||General Motors||Hummer||0.67||1.00|| || ||0.83||D||0.67||D||3.00
|218||General Motors||Pontiac||1.43||1.46||2.33|| ||1.53||C||1.37||D||3.80
|226||General Motors||Saturn||1.48||1.58||2.00|| ||1.49||D||1.06||D||3.25
|255||Land Rover||Land Rover||0.33||0.25||0.00|| ||0.17||F||0.00||F||1.33
|317||Suzuki||Suzuki||2.50||2.50|| || ||2.50||B||2.50||B||1.50
Notice that Toyota and Honda lines dominate the upper end of the reliability
spectrum for all age ranges.
||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
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.
||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.
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.
||Although this site was created using software by Microsoft,
you may encounter difficulty in downloading a PDF file from this
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
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
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