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The 30 Worst Automobiles in 2011 by James Bleeker

Next, the least reliable convertibles, coupes, sedans, hatchbacks, minivans, sport-utility vehicles (including car-based crossovers), and pickup trucks are listed in ascending order of reliability (least reliable automobiles first). The Bottom Ten Automobiles, Bottom 20 (23 by tie) Automobiles, and Bottom 30 Automobiles with an auto reliability data history of 3 or more years are:

General Motors Corporation's Chevrolet Uplander, a minivan with a 2011 Auto Reliability GPA of 0.00 over a 4-year auto reliability data history,
General Motors' Chevrolet Blazer, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.00 over a 4-year auto reliability data history,
General Motors' front-wheel-drive Saturn Outlook, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.00 over a 3-year auto reliability data history,
General Motors' Chevrolet Aveo, a small car with a 2011 Auto Reliability GPA of 0.15 over a 6-year auto reliability data history,
The Volkswagen Eos, a minivan with a 2011 Auto Reliability GPA of 0.17 over a 3-year auto reliability data history,
Daimler AG's Mercedes-Benz R-Class, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.28 over a 3-year auto reliability data history,
Volkswagen AG's V6 turbo-charged Audi A6, a sedan with a 2011 Auto Reliability GPA of 0.33 over a 3-year auto reliability data history,
Chrysler's Dodge Grand Caravan, a minivan with a 2011 Auto Reliability GPA of 0.38 over a 10-year auto reliability data history,
The extended Chrysler Town & Country, a minivan with a 2011 Auto Reliability GPA of 0.38 over a 10-year auto reliability data history,
Chrysler's 4-door Jeep Wrangler, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.38 over a 4-year auto reliability data history,

General Motors' GMC Safari, a minivan with a 2011 Auto Reliability GPA of 0.39 over a 4-year auto reliability data history,
General Motors' Chevrolet Astro, a minivan with a 2011 Auto Reliability GPA of 0.39 over a 4-year auto reliability data history,
General Motors' Hummer H3, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.42 over a 3-year auto reliability data history,
The turbo-charged Mazda CX-7, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.50 over a 3-year auto reliability data history,
The turbodiesel, 4-wheel-drive Ford F-250, a heavy-duty pickup truck with a 2011 Auto Reliability GPA of 0.58 over a 9-year auto reliability data history,
The Kia Sedona, a minivan with a 2011 Auto Reliability GPA of 0.60 over an 8-year auto reliability data history,
General Motors' V6 Saturn L-Series, a midsize sedan with a 2011 Auto Reliability GPA of 0.63 over a 4-year auto reliability data history,
BMW AG's Mini Cooper Hatchback S, a small car with a 2011 Auto Reliability GPA of 0.67 over a 6-year auto reliability data history,
General Motors' Chevrolet Monte Carlo, a coupe with a 2011 Auto Reliability GPA of 0.67 over a 5-year auto reliability data history,
Chrysler's V8 Jeep Grand Cherokee, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.69 over a 10-year auto reliability data history,
Chrysler's I6 and V6 Jeep Grand Cherokee, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.69 over a 9-year auto reliability data history,
General Motors' V8 GMC Envoy, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.69 over a 7-year auto reliability data history,
Ford Motor Company's 6-cylinder Volvo XC-90, a sport-utility vehicle (SUV) with a 2011 Auto Reliability GPA of 0.69 over a 6-year auto reliability data history,

The Nissan Quest, a minivan with a 2011 Auto Reliability GPA of 0.71 over a 5-year auto reliability data history,
Chrysler's Jeep Commander, a sport-utility vehicle with a 2011 Auto Reliability GPA of 0.72 over a 3-year auto reliability data history,
The Volkswagen New Beetle Hatchback, a small car with a 2011 Auto Reliability GPA of 0.75 over a 6-year auto reliability data history,
General Motors' V6 Cadillac STS, a sedan with a 2011 Auto Reliability GPA of 0.75 over a 4-year auto reliability data history,
The Chrysler Sebring Sedan, with a 2011 Auto Reliability GPA of 0.79 over a 8-year auto reliability data history,
The 4-cylinder, front-wheel-drive Volkswagen Passat, a sedan with a 2011 Auto Reliability GPA of 0.81 over a 10-year auto reliability data history,
General Motors' V6 Chevrolet Impala, a sedan with a 2011 Auto Reliability GPA of 0.81 over a 10-year auto reliability data history.

General Motors Corporation and the Chrysler Group dominate the 2011 worst auto list. GM accounts for 12 of 2011's least reliable automobiles, the Chrysler Group - another 7 of the least reliable automobiles, Volkswagen AG - another 4, Ford Motor Company - another 2, and Daimler AG, Mazda Motor Corporation, Kia Motors Corporation, BMW AG, and Nissan Motor Company each account for 1. Each manufacturer's percent share of the 2011 least reliable automobiles is depicted in the following bar graph.

Auto Manufacturer Percent Shares of the 30 Least Reliable Automobiles of 2011

Together, General Motors and the Chrysler Group account for 63.3% of the worst automobiles of 2011.

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" rating, a GP of 3.00 (that is, a B) is given to a CR "Better Than Average" rating, a GP of 2.00 (that is, a C) to an "Average" rating, a GP of 1.00 (that is, a D) to a "Worse Than Average" rating, and a GP of 0.00 (that is, an F) to a "Much Worse Than Average" 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 above GPAs are the Average GPAs given in the table "The Updated 2011 Motor Vehicle Reliability Grade Point Averages (GPAs) and Grades with Reliability GPAs for Four 4-Year Age Ranges and an Overall Average Reliability GPA" on the Updated Auto Reliability Grade Point Averages and Grades page.

The sources for Consumer Reports' ratings are the reliability tables in (1) the April 2011 issue of Consumer Reports, (2) Consumer Reports New Car Buying Guide: 2011, and (3) Consumer Reports Used Car Buying Guide: 2011.

Consumer Reports defines reliability as the infrequency of reported serious problems.

Additional Resources: Best 30 Automobiles in 2011

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