While 673 is a good credit score for a car loan, it will be difficult to qualify for a 0% APR. Most lenders will only give a 0% APR to borrowers with a credit score of 740 or higher.
However, you’ll still get a good rate on your loan with a 673 credit score! Typically, a lender will offer you an interest rate of 3.5% to 8.5%, depending on the lender you choose, your loan repayment period, and the type of car you decide to purchase.