Worst Used Car: Mini Cooper S Â© Provided by Consumer Reports Mini Cooper S When it comes to choosing a used car, you can put the odds on your side by choosing a model that performed well when new and has a great reliability track record. Of course, reliability hiccups can happen with any used car, but the Mini Cooper S has the worst history among all cars we have tracked over the past decade. Sure, the car is cute and delightfully entertaining, but year after year, the likelihood of having a problem that requires a repair is heartbreaking. And among the 17 trouble spots we track, engine major, engine minor, engine cooling, fuel system, body integrity, and body hardware have issues at an alarming rate. Although Consumer Reports often recommends skipping an extended warranty, the Mini Cooper S is a case where the investment would be a good hedge against potential problems. Joining the Mini Cooper S as among the worst used cars are the Chevrolet Cruze 1.4T and Ford Fiestaâ€”although these models have fewer model years to anchor their position among the worst of the worst. More from Consumer Reports: Consumer Reports has no relationship with any advertisers on this website. Copyright Â© 2006-2015 Consumers Union of U.S.