How to Change Battery in a Lexus Key Fob

Key with key fob in hand

If you’re having issues in Delray Beach with your Lexus key fob when trying to unlock and lock your vehicle, it might be time for a Lexus key battery replacement. Lexus batteries are designed to last between 1 to 2 years, but thankfully, it’s an easy switch to make. Learn more about how to change the battery in a Lexus key fob with the help of the service team at Lexus of Palm Beach today!


Signs You Need a Lexus Key Battery Replacement

When you stop your engine, you might get a low battery alert in your vehicle notifying you that the key fob battery is low. Here are a few more signs that it’s time for a Lexus key battery replacement:

  • Your Lexus’s Smart Access system and/or the push-button start isn’t functioning properly
  • The proximity detection area is smaller than usual
  • The LED indicator light on the key won’t turn on

Four Simple Steps for Lexus Key Battery Replacement

Before you take the proper steps on how to change the battery in a Lexus key fob, you’ll need a flathead screwdriver and a CR2032 lithium battery which you can find at our very own auto parts store. Once you have everything you need, follow these steps to conduct your Lexus key battery replacement:

  1. Push the release button on the side of the key fob, then remove the emergency key blade stored inside.
  2. Place the tip of the flathead screwdriver in the now open space that was housing the key blade. Apply gentle pressure to pop the key fob cover plate off.
  3. There may be an electronic key module covering the battery. If so, remove that first, then pop the old battery out with the screwdriver.
  4. Put the new CR2032 battery in place with the plus side facing up. Replace the electronic key module and pop the key fob cover plate back into place.

How to Reduce Key Fob Battery Drainage

To ensure you never miss a step along your Lake Worth commute, there’s a battery-saving mode which reduces battery drainage in your Lexus key fob. This is a simple and easy feature to set up which can be seen in the steps below:

  1. Hold down the LOCK button while simultaneously pressing the UNLOCK button two times.
  2. The electronic key indicator should flash four times. This confirms that battery-saving mode has been activated.
  3. When you’re ready to resume use of the Smart Access system and push-button start, just press any button on the key fob!

Find Lexus Key Battery Replacements at Lexus of Palm Beach

After seeing how to change the battery in a Lexus key fob, you can find the right replacement and get back on Lake Worth roads. You can check out more helpful service guides at Lexus of Palm Beach and ensure your luxury ride gets the maintenance it needs most with our service coupons and specials. We also have plenty of OEM parts and accessories to improve the look and feel of your Lexus. Contact us to schedule your appointment at our West Palm Beach dealership!


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5700 Okeechobee Boulevard • West Palm Beach, FL 33417

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Lexus of Palm Beach 26.7082964, -80.1578433.