How to Change the Battery in a Lexus Key Fob

Woman handing over car keys


If your Lexus key fob has become less responsive or is no longer working, it’s time for a Lexus key battery replacement. Take a moment to learn about the signs of a weakening Lexus key fob battery, and how to replace it. Then, explore our parts specials and contact the Haldeman Lexus of Princeton parts department to get an OEM replacement near Princeton, NJ. 

Signs That It’s Time for Lexus Key Battery Replacement 

When you stop your engine in your Hamilton, NJ driveway, you may hear a low battery alert from inside your cabin. This isn’t the case for every Lexus, however, so if you suspect that your battery needs to be replaced, but you haven’t received an alert, watch for these signs: 

  • Proximity detection area is smaller than usual
  • LED indicator light on the key won’t shine
  • Lexus’s Smart Access system and/or the push-button start not functioning

How to Perform Lexus Key Fob Battery Replacement 

Now let’s explore how to change the battery in a Lexus key fob. Get a flathead screwdriver and a CR2032 lithium battery from our parts department or a Yardley, PA hardware store. Once you’ve gathered your tools, perform the following steps: 

  1. Press the release button on the side of your key fob to expose the emergency key blade stored inside your fob.
  2. Press the tip of your flathead screwdriver in the open space that houses the key blade. Apply gentle pressure as you pry off the key fob cover plate.
  3. Once you’ve exposed the battery, pop it out with the screwdriver. Be sure to remove any electronic key modules covering the battery.
  4. Place the CR2032 battery in the compartment, and then reassemble your key fob. 

Explore Our Lexus Service Guides for More Tips 

Now that you’ve read our overview of how to change the battery in a Lexus key fob, take a moment to explore our site. Yardley, PA drivers will find a number of Lexus research guides and service tips for other informative reads, including our overview of how often to change our car battery!

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