Lenders consider your creditworthiness to determine your risk as a borrower. When seeking financing for a car, having a high credit score helps you access better loan options. Those with lower credit scores, on the other hand — typically 300–579 for FICO and 300–600 for VantageScore — have demonstrated that they haven't yet learned to manage credit responsibly and are, therefore, deemed higher-risk borrowers.
Nevertheless, getting approved for a car loan with bad credit is possible. But bear in mind that it may be difficult to get favorable terms. Make sure you compare interest rates and loan terms from multiple lenders.