Volkswagen tested a free insurance incentive in two states in which drivers who bought or leased a new Golf, New Beetle or New Beetle convertible received a year of free insurance. VW says the incentive worked but does not plan to expand the program to more cars or different states. VW dealers in Illinois and Wisconsin witnessed sales increases of 23 percent in the models with the incentive, while most of the country posted sales loses. Estimated cost of the insurance was $1,300 to $3,000 per car. VW does not rule out a possible return of the free insurance incentive in the future.