How to Replace Lexus Key Fob Battery: Step-by-Step Guide

Ever found yourself stranded with a dead key fob? Frustrating, right? Well, fear not – we’ve all been there. The good news? You can easily change the battery in your Lexus key fob without breaking a sweat. Curious to learn how?

Imagine this: you’re running late for an important meeting, and your key fob decides to play dead. Not the ideal situation, is it? But don’t worry, with a few simple steps, you can replace the battery in your Lexus key fob and get back on the road in no time.

Step 1: Gather the necessary tools

When tackling the task of opening your Lexus key fob to change the battery, the first step is to ensure you have the essential tools readily available. Here’s what you’ll need:

  • Replacement battery: Get the correct type of battery for your Lexus key fob model. Refer to your vehicle’s manual or check the current battery for specifications.
  • Small flathead screwdriver: This tool will come in handy to carefully pry open the key fob casing.
  • Precision screwdriver set: Having a set of precision screwdrivers will help in opening the key fob without causing damage.
  • Soft cloth or towel: Use this to avoid scratches on your key fob during the battery replacement process.

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With these tools on hand, you’re all set to move on to the next steps in replacing the battery of your Lexus key fob.

Step 2: Locate the slot for opening the key fob

To open your Lexus key fob, you’ll need to find the slot that allows access to the internal components. Look for a small indentation along the edge of the fob – this is where you’ll insert the screwdriver to pry open the casing.

Once you’ve located the slot, gently insert the small flathead screwdriver. Be careful not to apply too much force to avoid damaging the key fob. The precision screwdriver set can also come in handy here, as it allows for more controlled movements.

With the screwdriver in place, twist it slightly to separate the key fob casing. Take your time and work your way around the fob to gradually release all the clips holding it together. Use the soft cloth or towel to prevent any scratches while you work.

Remember, patience is key in this process. Take it slow and steady to avoid any mishaps that could lead to additional repairs.

Step 3: Open the key fob carefully

When opening the Lexus key fob, ensure you have the right tools ready:

  • Precision Screwdriver Set
  • Small Flathead Screwdriver
  • Soft Cloth or Towel

Follow these steps to carefully open the key fob:

  • Insert the small flathead screwdriver into the slot located on the side of the fob.
  • Gently twist the screwdriver to release the clips holding the fob together.
  • Work your way around the fob, releasing each clip slowly and carefully.
  • Once all clips are released, separate the key fob carefully to avoid any damage.

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Remember, patience is key when handling the key fob to prevent any mishaps.

Step 4: Remove the old battery

When it’s time to replace the battery in your Lexus key fob, the next step is to remove the old one. Here’s a simple guide to help you through this process:

  • Locate the battery: In the open fob, you’ll find the old battery. It’s usually easy to spot once you’ve separated the key fob casing.
  • Use caution: Gently remove the old battery from its housing. Be careful not to damage the surrounding components as you extract it.
  • Dispose of the old battery properly: Once you’ve taken out the old battery, make sure to dispose of it in an environmentally friendly way. Consider recycling options for used batteries.
  • Inspect for any corrosion or damage: Check the area where the old battery was placed for any signs of corrosion or damage. Cleaning it before inserting the new battery can help maintain proper function.

Step 5: Replace the battery with a new one

When it’s time to replace the battery in your Lexus key fob, follow these simple steps to ensure a smooth transition:

  • Step 1: Carefully remove the old battery from the designated slot.
  • Step 2: Check for any signs of corrosion or damage in the battery compartment.
  • Step 3: Once you’ve confirmed that the area is clean, insert the new battery with the correct orientation.
  • Step 4: Gently press the battery into place to secure it properly.
  • Step 5: After replacing the battery, reassemble the key fob by reversing the disassembly process.

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Remember, using the correct battery type is crucial for the optimal functioning of your Lexus key fob. Consult your vehicle manual or a professional if you’re unsure about the specific battery requirement.

Incorporate these steps into your maintenance routine to keep your key fob in excellent working condition at all times.


That’s it! By following the simple steps outlined in this guide, you can easily change the battery in your Lexus key fob. Remember to use the correct battery type and handle the key fob with care to ensure it continues to work smoothly. Regular maintenance is key to keeping your key fob in top condition. With these tips, you’ll be able to replace the battery in your Lexus key fob hassle-free. Happy driving!

Frequently Asked Questions

What type of battery should I use to replace the Lexus key fob battery?

Use a CR2032 3V lithium coin cell battery for replacing the Lexus key fob battery.

How do I remove the old battery from the Lexus key fob?

Use a small flathead screwdriver to carefully pry open the key fob and remove the old battery.

What should I do if I notice any damage to the key fob battery?

If you see any damage, do not proceed with replacing the battery and consider seeking professional help.

How do I ensure the new battery is inserted correctly in the Lexus key fob?

Make sure the new battery is placed with the correct polarity facing up in the designated slot.

How do I secure the new battery in place after inserting it?

Gently press the new battery into the slot until it is securely in place within the key fob.

What is the final step after replacing the battery in the Lexus key fob?

Reassemble the key fob by putting the casing back together and ensuring it is properly sealed.

Battery industry professional with 5+ years of experience. Bachelor of Science in Electrical Engineering from Georgia Tech. Specializes in power systems and renewable energy.

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