Nissan Repair: data lost?, maintenance mileage, preset stations

Question
I have to replace my battery, will I lose all my data such maintenance mileage, radio stations etc?

Answer
Hi Dan -

What year Nissan do you have? On some later models you will need an access code to activate the radio if the battery is removed. This is an anti theft device.

Anyway, the maintenance mileage and computer will not lose its memory, however the radio preset stations will be lost.

Hope this helps
aloha
calvin