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The 9 Least Reliable and Durable Car Brands of Model Year 2005 This page lists the 9 worst car brands (as well as the 15 worst car brands) of model year 2005 by reliability-and-durability grade point average (R-D GPA). 2005's Bottom 9 Car Brands: The Nine Worst The 9 worst car brands of 2005 are listed below in ascending order of Reliability-Durability GPA (worst first), together with their corresponding R-D GPA and Grade.
The computation of the Reliability-Durability GPA of the Chrysler line does not include that of the Mercedes-engineered Crossfire.
The Next 6 Car Brands of 2005
The next 6 car brands are listed below in ascending order of Reliability-Durability GPA (worst first).
The computation of the Reliability-Durability GPA of the Pontiac line does not include that of the Toyota-engineered Vibe.
Chart of the 15 Worst Car Brands of 2005
The following bar graph depicts how much below average the Bottom 15 car brands of 2005 are. The 15 worst are listed in ascending order (worst first).  Although the last five of the bottom 15 have a R-D Grade of C, all of the Bottom 15 are rather considerably below the average.
Worthy of note is that the Nissan brand is among the Top 7 of 1986 but among the Bottom 15 of 2005.
Computations
To compute the reliability-durability grade point average of the MY 2005 cars, Consumer Reports' reliability ratings for the age ranges 4-to-5 years and 5-to-6 years are used. CR's ratings are converted to numerical values following the standard academic pattern: a grade point of 4.0 (an A) is accorded a rating of Much Better Than Average, a 3.0 (a B) is accorded a rating of Better Than Average, a 2.0 (a C) is accorded a rating of Average, a 1.0 (a D) is accorded a rating of Below Average, and a 0 (an F) is accorded a rating of Much Below Average. Then, for each age range, the grade point of CR's overall reliability rating is weighted 2/3 and the average of the grade points of the category ratings is weighted 1/3. Then, the average for the two age ranges is taken. Finally, a car brand's Reliability-Durability GPA is computed by taking the average of the Reliability-Durability GPAs of its models. Best and Worst Car Brands of Each Model Year The Best Car Brands of Each Model Year by Reliability-Durability GPA: 1985 1986 ... 2004 2005 The Worst Car Brands of Each Model Year by Reliability-Durability GPA: 1985 1986 ... 2004 2005 Additional Resources The Best Cars of Each Model Year by Reliability-Durability GPA: 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 ... 2004 2005 The Worst Cars of Each Model Year by Reliability-Durability GPA: 1980 1981 1982 1983 1984 1985 1986 ... 2004 2005 The Best Car Manufacturers of Each Model Year by Reliability-Durability GPA: 1985 1986 ... 2004 2005The Worst Car Manufacturers of Each Model Year by Reliability-Durability GPA: 1985 1986 ... 2004 2005 Best Car Brands by CR's List of Used Cars to Avoid: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Worst Car Brands by CR's List of Used Cars to Avoid: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Best Car Makers by CR's List of Used Cars to Avoid: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Worst Car Makers by CR's List of Used Cars to Avoid: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 For additional car quality information, visit www.AutoOnInfo.net and CarsOnInfo.net.In particular, for additional durability information, see:
www.CarQualityInfo.net: The car-quality website for the brighter-than-average North American consumer.
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