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What are the least reliable car brands? To help you avoid buying a new or used car that will be unreliable, Consumer Reports gathered data on over 330,000 vehicles to tell you which cars will end up in the repair shop, and which will keep you on the road. How do cars from brands like Toyota and Hyundai compare to vehicles made by Jeep, Honda, Chevrolet, and Mercedes-Benz? Before you buy your next vehicle, check our site for over two decades of reliability information!