The lemon law protects consumers who have purchased or leased new or used vehicles.  When people refer to “the lemon law” or “California lemon law,” they are actually referring to a law called the “Song-Beverly Consumer Warranty Act” or “Song-Beverly” for short. It says that a manufacturer must replace your vehicle or give you a refund if your vehicle has a defect that substantially impairs the use, value, or safety of the vehicle and the manufacturer has not been able to fully repair the vehicle within a reasonable number of opportunities.