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How to Replace the Key Fob Battery in a Nissan Altima

Model: Nissan Altima L31 - Years 2002-2006
Part: Key

This tutorial shows how to replace the key fob battery in a Nissan Altima, a very simple and inexpensive task. To do this, you will need a small flathead screwdriver and a replacement CR2025 battery. First, locate the slot on the bottom edge, then insert the screwdriver into it and, using leverage, unlock the two halves of the key fob. Once fully opened, proceed to replace the battery, ensuring the replacement is positioned with the negative terminal facing up. Finally, reassemble the key fob.

Updated on 29 July 2026 by ScegliAuto

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