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The 20 Least Reliable and Durable Cars of Model Year 1983 This page lists the 20 worst cars of model year 1983 by reliability-and-durability grade point average (R-D GPA). 1983's Bottom 10 Cars: The Ten Worst The 10 worst cars of 1983 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 least reliable-durable cars in 1983 decreased from all 10 in 1982 and tied with its 1981 share of 6. Chrysler Corporation's share of the worst increased from 0 in 1982 and tied with its share of 2 in 1981. American Motors share of 2 in 1983 increased from 0 in 1982 and 1 in 1981. Ford Motor Company accounted for none of the 10 worst in 1983, as it did in 1982, 1981, and 1980. None of the then Michigan 4 manufacturers (American Motors Corporation was absorbed by Chrysler Corporation in 1987) accounted for 1983's best cars or 1982's best cars. The following chart depicts manufacturer percent share of the Bottom 10 of 1983.
1983'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 accounted for 75% of the 20 worst cars of model year 1983 - down from its 80% in 1982, equal to its 75% in 1981, and up from its 50% in 1980. Chrysler Corporation accounted for 10% of the 20 least reliable-durable cars of 1983 - same as in 1982 and 1981 and down from 25% in 1980; AB Volvo - 5%, up from 0% in 1982, 1981, and 1980; Ford Motor Company - 0%, down from 10% in 1982, but equal to its 0% in 1981 and 1980. The Detroit 3 manufacturers (General Motors, Chrysler, and Ford) accounted for 17 of 1983's 20 worst cars. The following chart gives each car maker's percent share of the Bottom 20 of 1983.  Manufacturer Shares of Vehicles with a Reliability-Durability GPA of Worse than 1.00 Each manufacturer's percent share, rounded to the nearest percent, of the 36 vehicles with a R-D GPA of less than 1.00 is:
In 1983, the Michigan 4 accounted for all but one of the vehicles with a Reliability-Durability GPA of less than 1.00. Computations To compute the reliability-durability grade point average of the MY 1983 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. Finally, the average for the two age ranges is taken. The V8 Cadillac Seville, the Mercury LN&, the Ford EXP, the V6 Chevrolet Monte Carlo, the 4-cylinder Oldsmobile Omega, and the 4-cylinder Cadillac Cimarron offered 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 2006Worst 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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