How to Change Lexus Key Fob Battery

1. Remove the key fob cover using a flathead screwdriver
2. Take out the old Lexus key fob battery
3. Insert a new battery, matching the polarity
4. Reassemble the fob and test it

Why Change the Lexus Key Fob Battery?

Changing the battery in your Lexus key fob is important for several reasons. A weak or dead battery can cause:

• Difficulty locking or unlocking the doors: If the key fob doesn’t send a strong enough signal, you might struggle to lock or unlock your car.
• Problems starting the car: The key fob’s signal is also used to start the car, and without a fresh battery, this can become problematic.
• Reduced range: If the battery is low, you may need to be closer to your vehicle for the key fob to work.

Replacing the key fob battery is a simple task that can prevent these issues and keep your Lexus operating smoothly.

When to Change Your Lexus Key Fob Battery

Typically, the battery in your Lexus key fob should last around 1 to 3 years, depending on the usage and type of battery. Some signs it’s time to replace the battery include:

• Weak signal: If you find yourself standing too close to the car or repeatedly pressing the fob to get it to work, it’s a sign the battery may be weak.
• Not working at all: If the key fob stops working entirely, the battery is likely dead.
• Warning light: Some Lexus models will display a warning light on the dashboard indicating that the key fob battery is low.

If you notice any of these symptoms, it’s time to change the Lexus key fob battery.

Tools You’ll Need

Changing the battery in your Lexus key fob requires just a few basic tools:

• Flathead screwdriver: This will help you pry open the key fob casing.
• Small Phillips-head screwdriver: Some models may require this to remove screws.
• New battery: Make sure you purchase the correct replacement battery for your Lexus key fob. Typically, Lexus key fobs use a CR2032 battery, but check your owner’s manual to be sure.

Having these tools on hand will make the process much easier and faster.

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

Step 1: Remove the Key Fob Cover

To start, you’ll need to remove the key fob cover. Use a flathead screwdriver to gently pry open the casing. Be careful not to damage the fob as you work around the edges. Some key fob models have a small indentation or notch that makes this process easier. Once the cover is loosened, you can carefully pull it apart.

Step 2: Take Out the Old Battery

Once you’ve removed the key fob cover, you’ll see the battery inside. Carefully remove the old battery. If the battery is stuck, you can use the flathead screwdriver to gently lift it out. Make a note of the battery’s orientation (which side is facing up), as it’s important to place the new battery in the same direction.

Step 3: Insert the New Battery

Now it’s time to insert the new Lexus key fob battery. Take the new battery, making sure it’s the correct type (usually a CR2032 coin cell battery) and insert it with the correct polarity. The positive side should be facing up, as indicated by the markings inside the fob. Gently press the battery into place, ensuring it’s securely seated.

Step 4: Reassemble the Key Fob

With the new battery in place, it’s time to reassemble the key fob. Carefully align the two halves of the key fob casing and snap them back together. If your fob had screws, use a small Phillips-head screwdriver to fasten them. Ensure the fob is fully closed and that there are no gaps.

Step 5: Test the Key Fob

Now that your Lexus key fob is reassembled, it’s time to test it. Stand near your car and press the buttons to see if the fob works as expected. You should notice that the key fob locks and unlocks the doors and starts the vehicle without any issues. If the key fob is still not working, double-check the battery orientation and make sure the fob is properly assembled.

Common Mistakes to Avoid

While changing the battery in your Lexus key fob is a straightforward task, there are a few mistakes to avoid:

1. Using the wrong battery type: Make sure you use the correct replacement battery for your key fob. Using the wrong size or type may cause the key fob to malfunction.
2. Forgetting to test the fob: After reassembling the key fob, don’t forget to test it to ensure it’s working properly.
3. Damaging the key fob casing: Be careful when prying open the fob to avoid cracking or damaging the plastic casing.

Taking your time and being cautious will help you avoid these common mistakes.

Tips for Prolonging Your Lexus Key Fob Battery Life

To get the most out of your Lexus key fob battery, here are a few tips:

• Avoid exposure to extreme temperatures: Keep your key fob away from extreme heat or cold, as this can shorten the battery’s life.
• Don’t press buttons unnecessarily: Pressing the buttons on your key fob repeatedly can drain the battery faster. Use the fob only when necessary.
• Store it in a safe place: When not in use, store your key fob in a safe place to prevent accidental button presses.

By following these simple tips, you can help extend the lifespan of your Lexus key fob battery.

Conclusion

Replacing the battery in your Lexus key fob is an easy and affordable maintenance task that you can do at home. By following the steps in this guide, you can ensure that your key fob continues to work smoothly, unlocking your car and starting the engine without any issues. Regularly checking and replacing the battery will help you avoid inconvenient malfunctions and keep your Lexus functioning at its best.

Changing the Lexus key fob battery is a small but important step in keeping your vehicle in top condition. If you’re unsure of the battery type or run into any difficulties, don’t hesitate to consult your owner’s manual or visit your local Lexus dealership for assistance.