The key to getting good used car loan rates is to comparison shop. You don't need to take the first loan that you find. Instead try looking at several loans until you find the one that is the best. If you don't have the time to shop for loans you can use an online loan broker. Brokers take your application and find the best loan deal for you. Even those with poor credit can often find good loans this way.
When you're looking for good used car loan rates remember to keep in mind what the lenders will be looking for. Yes, they will be reviewing your credit history but they will also be looking at your ability to pay the loan back. This means that they want to see realistic payment options that you can afford with your current income. To find out what your optimal payments will be and how much you can afford to pay for a car you can use an online loan calculator.
When you're realistic about what you can afford you'll be more apt to be able to get good used car loan rates. If you do have poor credit you'll want to consider putting more money down on the vehicle. This way you won't need to finance as much and you'll be more likely to get a good loan deal. Also, consider your monthly payments. Don't overestimate the amount of money that you can pay for car payments each month. It's better to underestimate in this area.
The make, model and age of the vehicle may also affect used car loan rates. Check the bluebook value of the car before you decide on a price. Your lender won't be willing to finance a vehicle for more than what it is worth. You should be able to put down at least 20% on a car and finance 80% or less. The more money you are able to put down on the car the better your used car loan rates will probably be.