With just a year of on-time payments, you might be able to refinance your car loan, replacing your existing loan with one from a new lender. By refinancing, you can lower your interest rate, change the length of your loan to suit your needs, or both. What is auto loan refinancing? Why you might want to refinance Who should refinance How to refinance What is auto loan refinancing? Refinancing your auto loan means replacing your existing loan with a new one from a different lender.