How to Replace Lexus RX 350 Key Fob Battery: Step-by-Step Guide

Ever found yourself locked out of your Lexus RX 350 because the key fob battery died at the most inconvenient moment? How frustrating! But fear not, as we’ve got your back with a simple solution that’ll save you time and hassle. In this article, you’ll discover the quick and easy steps to replace the battery in your Lexus key fob.

Step 1: Gather Necessary Tools

To successfully change the battery in your Lexus RX 350 key fob, you’ll need to gather a few essential tools.

Here’s what you’ll need:

  • New Battery: Ensure you have the correct replacement battery for your Lexus key fob.
  • Small Flat-Head Screwdriver: This tool will help you safely open the key fob.
  • Tweezers or Small Pliers: Useful for handling the small battery with precision.
  • Cloth or Towel: To protect the key fob and your work surface.

Now that you have the necessary tools on hand, you’ll be ready to proceed with replacing the battery in your Lexus RX 350 key fob.

Step 2: Identify the Key Fob Model

When it comes to identifying your Lexus RX 350 key fob model, it’s essential to locate the appropriate information. You can typically find the model number either on the back of the key fob or in the owner’s manual. This number is crucial for ensuring you purchase the correct replacement battery for your specific key fob.

Click here to preview your posts with PRO themes ››

To avoid errors and potential setbacks, double-check the model number before proceeding. Using the wrong battery can lead to malfunctions or the key fob not working as intended. If you’re unsure about the model or battery type, don’t hesitate to consult your Lexus dealership or refer to the official Lexus website for accurate information.

Understanding your key fob model ensures a smooth battery replacement process without any complications. By taking this simple step, you set yourself up for a successful key fob maintenance experience.

Step 3: Open the Key Fob

To open your Lexus RX 350 key fob, locate the hidden key.

Insert the key into the slot, which can be found on the side or bottom of the fob.

Twist the key to separate the two halves of the key fob.

Be gentle to avoid damaging the fob during this process.

Step 4: Remove the Old Battery

Once you have the key fob open, it’s time to change the old battery. Here’s what you should do:

  • Locate the battery: Look for the small battery inside the key fob.
  • Remove the old battery: Gently pry out the old battery using a tool or your fingers.
  • Dispose of the old battery properly: Remember to recycle the old battery in an eco-friendly way.
  • Avoid touching the new battery: Handle the new battery carefully by its edges to prevent any damage.
  • Insert the new battery: Place the fresh battery in the correct position inside the key fob.

Understanding these steps is crucial for a successful battery replacement process.

Click here to preview your posts with PRO themes ››

Step 5: Insert the New Battery

Congratulations on making it to this step! Now, it’s time to insert the fresh battery into your Lexus RX 350 key fob. Here’s how you can do it:

  • Ensure the new battery is the correct type and size for your key fob.
  • Position the battery correctly in the compartment, making sure the positive and negative sides match the indicators inside.


That’s it! You now have all the steps needed to change the battery in your Lexus RX 350 key fob. Remember to handle the old and new batteries with care and dispose of the old one properly. Ensuring the correct placement of the new battery is key to a successful replacement process. By following these simple instructions, you can keep your key fob functioning smoothly. Happy driving!

Frequently Asked Questions

Q: How do I replace the battery in my Lexus RX 350 key fob?

A: To replace the battery, locate the old one, gently remove it, and dispose of it properly. Insert the new battery carefully, ensuring the correct positioning with the positive and negative sides matching the indicators inside.

Q: Why is it important to handle the new battery carefully?

A: Handling the new battery carefully is vital to prevent damage and ensure the key fob functions correctly after replacement.

Q: What should I consider while inserting the new battery?

A: Make sure the new battery is the correct type and size, and position it correctly inside the compartment to match the positive and negative sides with the indicators inside.

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

Leave a Comment

Send this to a friend