Can a 17 year old buy car on credit?

No, in the United States, to buy a car on credit, the buyer must be 18 years of age or older in most states. In a few states, the age requirement may be lower at 16 or 17, but parental permission is usually required. Some lenders may apply specific conditions, such as requiring a parent or guardian to co-sign the loan agreement or offering special loan options designed for younger buyers.