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How to Replace the Key Battery on a Lexus NX 300

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

Start by pressing and holding the side button of the key fob on your Lexus NX 300, then extract the physical emergency key. Next, using the emergency key as a lever, unclip and remove the back of the key fob. Once done, unclip and remove the key's circuit board, and you will have access to the key battery, which you need to extract. When you have completed this step, the disassembly will be finished. To install the new battery, repeat this procedure in reverse, and the replacement will be complete.

Updated on 19 April 2026 by ScegliAuto

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