As of 2013 year end, there are 246 million Vehicles in Operation in US.

Each year, over 50 million New and Used cars get sold in USA generating over $400 billions of auto loans and leases. Most banks and financial services companies focus on offering Indirect auto loans through dealers.

Auto Loans require credit review of the buyer and are backed by the value of the car. Auto Financing hence, involves risk assessment of both - the buyer and the vehicle that the buyer is purchasing.

Below are some third party resources that will help you learn more about Auto Financing

1) FTC - Understanding Vehicle Financing (https://www.consumer.ftc.gov/articles/0056-understanding-vehicle-financing)

2) AWARE -- Americans Well-informed on Automobile Retailing Economics (http://www.autofinancing101.org/)