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How to Replace the Key Battery of a Lexus NX 300

Model: Lexus NX MK 1 - Years 2014-2021
Part: Key

Start by pressing and holding the button on the side of the electric key of your Lexus NX 300, then extract the physical key inside. After doing this, using the emergency key to lever, unclip and remove the back of the key, then unclip and remove the key's motherboard. Once you have removed the motherboard, you will reach the flat battery, which you need to extract. When you have removed the battery, the disassembly will be complete. To install the new battery in your Lexus NX 300 key, repeat this procedure in reverse, and the replacement will be finished.

Updated on 21 May 2026 by ScegliAuto

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