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How to Replace the Key Battery on the Infiniti Q40

Model: Infiniti Q40 V36 - Years 2014-2015
Part: Key

When you notice that the remote key does not open the vehicle's doors, the battery in the key has likely died, and it needs to be replaced. Here are the instructions on how to proceed: First, press the small button to release and extract the emergency key. Then, use a sharp object to pry open the seam of the remote cover and detach it. Behind the cover is the battery compartment, which can be removed by prying it with a small sharp object. Take the new CR 2025 battery and position it, ensuring the correct orientation with the positive terminal facing up. Finally, reattach the remote cover and reinsert the emergency key.

Updated on 20 May 2026 by ScegliAuto

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