How to Change the Battery in a Lexus Key Fob

Black modern car door opener and keyless entry device with thumb pressing lock

If you buy a new or pre-owned Lexus vehicle in Sarasota, your car will come with a handy accessory: the Lexus key fob. If this seems to be malfunctioning sporadically, it’s good to know how to change the battery in a Lexus key fob, an easy task outlined below and among the parts tips at Wilde Lexus Sarasota.

Lexus Key Battery Replacement: When to Change 

Your Lexus key battery should last you about 1-2 years. There are obvious signs Lakewood Ranch drivers can recognize for a Lexus key battery replacement, like an aural low battery alert, but there are also more subtle indicators: 

  • There is no longer an LED indicator light. 
  • Push Button start, which is based upon proximity to the key fob, doesn’t work
  • Smart Access doesn’t work 
  • Your key fob no longer has “the range.” 

Lexus Key Battery Replacement: Step-by-Step Instructions 

Your Lexus key uses a CR2032 lithium battery — a flat, round battery. The simplest way to make sure you’ve got the right one is ordering parts from a Venice-area parts center or going to your local hardware/electronics store.

  • Step 1: Dry your hands so as to eliminate the possibility of moisture-caused battery rust.
  • Step 2: Push the release button on the side of the fob so the key comes out. 
  • Step 3: Use a flathead screwdriver to pop open the key fob cover. Pro tip: putting tape on the tip of the screwdriver will prevent scratching! 
  • Step 4: Remove battery, first removing the key module if it’s there.
  • Step 5: Battery in, plus side up. Then put the key fob back together!

Lexus Key Battery Replacement: Battery Saving Mode

You might be surprised to find out that your key fob comes with a battery saver mode! Like a car battery, there are proactive steps you can take to save power. Here’s how to access that mode and other tips for battery saving. 

  • Hold down the lock button then press the unlock button twice. Your indicator will flash four times, meaning that you’re in battery saving mode. You’ll have to press any of the buttons on the fob to activate Smart Access and Push-Button Start. 
  • You can also save battery by keeping your key fob more than 3 feet away from electronics that produce magnetic fields (laptops, cell phones, TVs, battery chargers, induction cookers, table lamps).

Find Out More About Your Lexus with Wilde Lexus Sarasota!

Now that you know how to change the battery in a Lexus key fob, you may want to keep exploring DIY service tips. The experts at the service center at Wilde Lexus Sarasota are happy to inform drivers from Sarasota to Bradenton with tips about their vehicles, so contact us with any questions! 

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