How to Put Battery in Lexus Key Fob: A Step-by-Step Guide

Replacing the battery in your Lexus key fob is a simple task that can be done at home in a few minutes. You won’t need any special tools or technical knowledge. This guide will walk you through the process, answer common questions, and help you get back on the road quickly.

Locating the Battery Compartment

Lexus key fobs vary slightly in design depending on the model and year of your vehicle. However, the process of accessing the battery compartment is generally similar:

Examine your key fob: Look for a small release button or latch. This is usually located on the back or side of the fob.
Press and hold the release button: While pressing the button, gently separate the key fob’s two halves. You might feel a slight click as they detach.
Identify the battery compartment: Once separated, you’ll see either the car key blade or a small battery compartment. If you see the key blade, simply remove it to access the battery compartment beneath.

Choosing the Correct Battery

Using the wrong type of battery can damage your key fob or result in poor performance. Refer to your Lexus owner’s manual for the specific battery model recommended for your key fob.

Common Lexus key fob battery types:

CR2032: This is the most common type of battery used in Lexus key fobs.
CR2450: Some models might use this larger battery.

You can find replacement batteries at most auto parts stores, electronics stores, and online retailers.

Replacing the Battery

Note the battery orientation: Before removing the old battery, carefully observe how it’s positioned within the compartment. Pay attention to the positive (+) and negative (-) markings.
Remove the old battery: Gently pry out the old battery using your fingernail, a small flat-head screwdriver, or a plastic prying tool. Avoid using excessive force, as this could damage the compartment.
Insert the new battery: Align the positive (+) and negative (-) markings on the new battery with the corresponding markings inside the compartment. Press the battery firmly into place.
Reassemble the key fob: Align the two halves of the key fob and press them together until you hear a click. Ensure they are securely fastened.

Testing the New Battery

Once you’ve replaced the battery, test your key fob’s functionality:

Lock and unlock your Lexus: Stand within range of your vehicle and press the lock and unlock buttons on your key fob. The car’s lights should flash, and you should hear the locks engaging and disengaging.
Start the engine: Insert the key fob into the ignition or keep it nearby if you have a push-button start. Try starting the engine to ensure the key fob is recognized.

Troubleshooting Tips

If your Lexus key fob still isn’t working properly after replacing the battery, consider these troubleshooting tips:

Re-check battery installation: Ensure the new battery is correctly positioned within the compartment, with the positive (+) and negative (-) terminals properly aligned.
Clean the battery contacts: Over time, battery contacts can accumulate dirt and corrosion, preventing a good connection. Use a cotton swab dipped in rubbing alcohol to gently clean the contacts inside the battery compartment.
Try a different battery: It’s possible the new battery you installed is faulty. Try a different battery from a fresh pack to rule out this possibility.

Still Having Trouble?

“Sometimes, a key fob issue might indicate a more complex problem, requiring professional diagnosis and repair,” says John Miller, Senior Automotive Technician at Miller’s Auto Repair. “If you’ve tried troubleshooting steps and your key fob still isn’t functioning correctly, it’s best to consult with a qualified automotive locksmith or your Lexus dealership.”

Conclusion

Replacing the battery in your Lexus key fob is a straightforward process that can save you time and money. By following the steps outlined in this guide and keeping a spare battery handy, you can ensure a smooth and hassle-free experience with your Lexus key fob for years to come.

For more information about Lexus key fob maintenance and programming, explore our other helpful resources:

Need further assistance? Contact our 24/7 customer support team via WhatsApp: +1 (641) 206-8880 or visit us at 1326 N Houston St, Amarillo, TX 79107, USA.