It’s a great idea to check to see if you qualify before applying for a loan.
Prequalification can give you an idea if you’re likely to be approved, but this isn’t legally binding. Additionally, it is a soft inquiry based on limited data, and it doesn’t impact your credit score.
Conversely, a preapproval is more official and likely to be closer to your final rate. The lender also does a hard inquiry on your credit, meaning that it impacts your credit score. A preapproval is often regarded just the same as approval, allowing you to use it for budgeting purposes and negotiating with car dealers.