Owners portal benefits mynissan owner portal is your vehicles online home where you can access model specific information designed to enhance your ownership experience if so equipped you can manage your nissanconnectr services and nissanconnect ev subscription through your mynissan account. Nissan consumer affairs po box 685003 franklin tn 37068 5003 phone 800 nissan 1 or 800 647 7261. To request this document please register on nmac finance account manager if you are already registered please proceed to login once logged in click the get balance button under the payoff quote section cancel. Contact nissan motor acceptance corporation customer service you can call nissan motor acceptance corporation at 800 778 4211 toll free number fill out a contact form on their website wwwnissanfinancecom or write a letter to nissan motor acceptance corporation po box 660360 dallas texas 75266 0360 united states