There is a presumption that a car is a lemon under New Jersey Lemon Law if the car has three or more repair attempts for the same problem OR the car is out of service for 20 days or more.  In addition, the use, value and safety must be significantly affected.  The manufacturer has the opportunity to rebut the presumption that the car is a lemon.

The car can also  be a lemon if the authorized automobile dealership fails to repair the car in a reasonable time period (jury decides this issue).