So, tempted as you might be by the new Mazda CX-5, ask yourself this: What is the average APR for a car loan? Luckily, with a good credit score, some patience, and some clever strategizing, you might still get an attractive APR on that new car loan. Bad/Low Credit Score: If your credit score and creditworthiness are poor, then you will have a hard time scoring lower interest rates and APRs. Try improving your credit score or applying with a co-signer who has a good credit score as a possible workaround. So, if you’re buying a new car, 11.9% is a very high APR, though it’s average if you’re buying a used car.