If you use credit, the issuer of that credit will report your account history to the credit bureau. The credit bureaus -- TransUnion, Experian and Equifax -- use this information to create a personal credit report on you. According to MyFico, your FICO credit score is based upon data found in your credit report. Your credit score affects the interest rate you receive on a car loan. Identification Your FICO credit score is broken down into five key areas: 35 percent of the score reflects how you pay your bills, 30 percent reflects the level...