To check your Bank of America auto loan balance, you can log in to the Bank of America website or mobile app. Once logged in, select My Accounts from the main menu and then click on the Loans & Credit tab. From there, you'll be able to view your outstanding balances for all loans associated with your account. You may also call 1-800-432-1000 and follow the automated prompts to access information about your auto loan balance or speak directly with a customer service representative who can provide up-to-date information. Additionally, if you have online banking set up through Bank of America's Mobile Banking App, you can easily track your loan payments and total balance due at any time by selecting “Account Details” under “My Accounts” once logged in.