If you have a new car with problems, you should visit one of the many technical service bulletin databases available online to see if the problem has been addressed in a bulletin or recall notice by the manufacturer. Often, even with the best designers creating new cars, your car may not have been perfectly engineered, and you may find that those small engineering flaws cause big problems. If there's not a TSB or a recall notice, do a Google search for the word Problem followed by your car's make and model, and see if other people have had the same issues.
If it turns out that your car has a problem, you may be entitled to have it fixed or bought back through small claims court because of your state's lemon law. Lemon laws are designed to protect consumers from the wrongdoing of large corporations. As a last resort you may choose to bring civil suit against a manufacturer that makes no efforts toward a reasonable solution to the problem. Solid proof that the problems in your car are due to errors by the manufacturer, and you're likely to receive a settlement, perhaps even before the case goes to trial.
Incidental expenses like car rental and your repeated trips to the mechanic aren't likely to be covered in the lemon law suit, unfortunately. For these expenses, you'll need to go to small claims court.
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