New York has what is called a "lemon law." You can find the actual law here: http://www.lemonlawamerica.com/new-york-lemon-law-statutes.htm. It sounds to me, that merely turning off the Traction Control System is not a valid repair since you are being deprived of a feature available at the time your lease was signed. Take a few minutes to review New York's Lemon Law (GBL 198-a) checklist: http://www.ag.ny.gov/consumer-frauds/new-car-lemon-law-fact-sheet . You should consult with a consumer rights attorney in your area.