Know all the details of your deal. For instance, what's your interest rate? Can you afford it? Is there a fee for prepayment? What's the grace period for payments? How will you get the title when the car is paid off?

Think also about warranties. What will the warranty cover? Is there something that would destroy you, financially, if it broke and your warranty doesn't cover? If so, you might want to renegotiate the terms of the warranty or start saving up for a rainy day.

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