In Consumer Reports' annual survey of the most reliable vehicles, owners reporting problems also highlight those models that haven't been doing as well. Based on these surveys, CR's engineers examine 17 different areas and weigh the severity of the problems to create scores for each model. To be considered for the list there must be at least two model years of data to ensure validity. Is your car on the list? Click through to see the 10 worst counting down to the least reliable vehicle scored this year.