Lemon laws vary from state to state. In some states, a single defect that might cause serious injury makes your car a lemon if the manufacturer cannot fix the problem within 1 attempt. Be sure to keep all of your records, receipts and repair history.
Laws vary state to state, but a rule of thumb is if the car problem can’t be fixed with 4 tries or the car has been out of commission for more than 30 days during the first year or 12,000 miles, your car most likely qualifies as a lemon.
A lawyer familiar with state lemon laws can help you determine a variety of problems like: was there damaged to your car at the time of delivery, deception, fraud, defects that may have been covered up by repairs etc.
Lawyers will investigate the history of your vehicle and submit the details to the manufacturer. At this point, the manufacturer either fixes the problem or ends up in court.
This site has a state by state lemon law guide http://lemoncarlemonlaw.com/ .

