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The 20 Least Reliable and Durable Cars of Model Year 2004 This page lists the 20 worst cars of model year 2004 by reliability-and-durability grade point average (Reliability-Durability GPA, or more briefly R-D GPA), as well as the 30 worst, 40 worst, and 50 worst. 2004's Bottom 10 Cars: The Ten Worst Automobiles The 10 worst cars of 2004 are listed below in ascending order of Reliability-Durability GPA (worst first), together with the corresponding R-D Grade.
Manufacturers of the 10 Worst General Motors Corporation's share of the 10 least reliable-durable cars of 2004 is 2 if the Saab 9-3 is not included in GM's total, 3 if it is. IFor model year 1984, General Motors' share of the 10 worst is 2. None of the Detroit 3 car makers (General Motors, Ford, and Chrysler) account for any of 2005's 10 best cars, 2004's 10 best cars, 1986's 10 best cars, 1985's 10 best cars, 1984's 10 best cars, 1983's 10 best cars or 1982's 10 best cars. 2004's Next 10 Worst Cars The remaining 10 of the 20 worst cars are listed below in ascending order of Reliability-Durability GPA (worst first), together with the corresponding R-D Grade.
Manufacturers of the 20 Worst General Motors Corporation's North American lines account for 10% of the 20 worst cars of model year 2004. With General Motors' Saab line included, GM accounts for 15% 2004's 20 worst. The Detroit 3 manufacturers (General Motors, Chrysler, and Ford) account for 13 of 2004's 20 worst cars. The following chart gives each car maker's percent share of the Bottom 20 of 2004. Saab and Volvo shares are given separately.  2004's Next 10 Worst Cars The last 10 of the 30 worst cars are listed below in ascending order of Reliability-Durability GPA (worst first), together with the corresponding R-D Grade.
Manufacturers of the 30 Worst Each auto maker's percent share, rounded to the nearest tenth of a percent, of the 34 worst vehicles by R-D GPA is given below. Saab and Volvo are listed separately.
Together, the Detroit 3 automakers account for 56.7% of the 30 worst cars of 2004, excluding the Saab and Volvo lines. With these lines included, the Detroit 3 account for 63.3%. The following bar graph depicts how much below average the Bottom 30 cars of 2000 are. The 30 worst are listed in ascending order (worst first).
2004's Next 10 Worst Cars The remainder of the Bottom 40 (Bottom 41 by tie) car models are:
Manufacturers of the 41 Worst Each automobile manufacturer's percent share, rounded to the nearest tenth of a percent, of the 41 worst ars is given below. Saab and Volvo are listed separately. Together, the Detroit 3 automakers account for 63.5% of the 41 worst cars of 2004, excluding the Saab and Volvo lines. With these lines included, the Detroit 3 account for 70.7% of the worst 41. 2004's Next 9 Worst Cars The remainder of the Bottom 50 car models are listed below.
Note that the 50 worst cars of 2004 have a Reliability-Durability Grade of D or F. Manufacturers of the 50 Worst Each automobile manufacturer's percent share of the 50 worst of 2004 is given below. Saab, Volvo, and Jaguar are listed separately. Although Volvo, Jaguar, Land Rover, and Saab were brands of the Detroit 3 in 2004, they were not in 1984 and were offloaded after 2004. Consequently, they are listed separately. Together, the Detroit 3 automakers account for 58% of the 50 worst cars of 2004, excluding the Saab, Volvo, and Jaguar lines. With these lines included, the Detroit 3 account for 66% of the worst 50. 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 2009 and 2010 Used Car Buying Guides are the primary sources of CR's reliability ratings, with supplementation by the April 2009 and 2010 issues of Consumer Reports. 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. Finally, the average for the two age ranges is taken. The Ford Explorer 2-wheel-drive, Volkswagen Jetta Turbo, Ford F-250 Turbodiesel 4-wheel-drive, Audi A8, GMC Envoy V8, Pontiac Aztek, Volkswagen Jetta 4-cylinder, and Mercedes-Benz SL only one age range of data. Best and Worst Vehicles of Each Model Year 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 Additional Resources 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 The Best Car Manufacturers of Each Model Year by Reliability-Durability GPA: 1985 1986 ... 2004 2005 The 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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