How to Replace Lexus RX350 Key Fob Battery Like a Pro

Ever found yourself locked out of your Lexus RX350 because the key fob battery died at the worst possible moment? Frustrating, right? But fret not, as we’ve got your back! In this article, we’ll walk you through the simple steps to change the battery in your Lexus RX350 key fob.

Imagine never having to worry about being stranded outside your car due to a dead key fob battery. With just a few minutes of your time and a new battery, you can save yourself from that hassle. Stay ahead of the game by learning this quick and easy process.

Step 1: Prepare the necessary tools

When it comes to changing the battery in your Lexus RX350 key fob, it’s essential to have the right tools at hand. Here’s what you’ll need to get started:

  • Replacement Battery: Ensure you have the correct battery type for your key fob.
  • Small Flathead Screwdriver: This will help you open the key fob without causing any damage.
  • A Safe and Well-Lit Area: Find a comfortable space with good lighting to avoid any mishaps during the process.

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By having these tools ready, you’ll make the battery replacement process smoother and quicker.

Step 2: Locate the slot for opening the key fob

When it comes to replacing the battery in your Lexus RX350 key fob, the next step after gathering your tools is locating the slot for opening the key fob. This slot is usually found along the seam of the fob and is used to access the internal components.

To open the key fob, insert a small flathead screwdriver into the slot and gently twist to separate the two halves of the fob. Take care not to apply too much force to avoid damaging the fob.

Once you’ve successfully opened the key fob, you’ll be able to access the old battery that needs replacing. Identify the type of battery used in your key fob before proceeding to the next step of the battery replacement process.

Remember, locating the slot for opening the key fob is a crucial step in the battery replacement process, so take your time and handle the fob with care to avoid any unnecessary damage.

Step 3: Open the key fob carefully

  • Locate the seam: Find the slot along the edge of the fob.
  • Use a flathead screwdriver: Gently insert and twist to pop open the fob.
  • Avoid excessive force: Be gentle to prevent breaking any internal components.

Step 4: Remove the old battery

It’s time to replace the old battery in your Lexus RX350 key fob. Here’s how you can do it:

  • Identify the battery: Look for the small battery inside the key fob. It’s usually a CR2032 battery.
  • Remove the old battery: Use a small tool like a flathead screwdriver to carefully pry the old battery out of its slot.
  • Dispose of the old battery properly: Remember to recycle the old battery in accordance with local regulations.

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Battery Information

Battery Type Commonly Used In
CR2032 Key fobs, watches

Recycling Tip

When disposing of old batteries, consider taking them to a local recycling center or utilizing a designated battery recycling program to do your part for the environment.

With the old battery out, you’re one step closer to having your Lexus RX350 key fob working like new again.

Step 5: Replace the old battery with a new one

  • Choose a fresh CR2032 battery for replacement
  • Place it in the same position the old battery was removed
  • Ensure the positive side faces up
  • Use firm, gentle pressure to slot the battery in
  • Listen for a click to confirm proper placement

Remember, CR2032 batteries are commonly used in key fobs for various car models.

Here are some key points to keep in mind:

  • CR2032 batteries typically last around 3-5 years
  • It’s important to replace them promptly to avoid key fob issues


That’s it! You’ve now learned how to change the battery in your Lexus RX350 key fob. Remember to use a CR2032 battery, insert it correctly, and listen for that satisfying click. Keeping your key fob battery fresh is key to avoiding any unexpected issues. Happy key fob maintenance!

Frequently Asked Questions

What type of battery is recommended for a Lexus RX350 key fob?

We recommend using a CR2032 battery for your Lexus RX350 key fob.

How should I insert the new CR2032 battery into the key fob?

Insert the new CR2032 battery in the same position as the old one, with the positive side facing up.

How can I ensure that the new battery is correctly placed in the key fob?

Listen for a click sound after inserting the new CR2032 battery to ensure it is properly seated in the key fob.

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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