Auto loan pre-approval demonstrates to dealers that you're a serious car shopper and helps you avoid overpaying on financing, ...

How long do you have before a preapproval letter on a car loan will expire? Each lender has its own expiration on preapproval letters, which may range from 30 to 60 days, on average.

An auto loan preapproval is when a lender declares they intend to offer a loan for a certain amount to help you purchase a car. Here's how to get a preapproval letter for a car loan.