Is social security number required when buying a new car from dealer?

It depends on the specific dealership and their policies, as well as the laws and regulations in your jurisdiction. In some cases, dealerships may request the buyer's social security number for identification and credit check purposes. However, it's important to note that providing your social security number is generally not mandatory and you have the right to refuse if you're uncomfortable sharing this information. It's always a good idea to inquire about the dealership's policies regarding the collection of personal information and understand the purpose for which it's being used.