Automobile maintenance

How to Change Battery in Lexus Key Fob

How to Change Battery in Lexus Key Fob
Written by Autofot
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Your Lexus Key Fob is a vital accessory for your car. Keeping it in good working order will ensure that you’re able to start your car and open your doors easily, even during long winters. Replacing the battery in your Lexus Key Fob is a simple task that can be done without visiting a dealership or mechanic. With the right tools and replacement battery, you can replace your key fob’s battery yourself in minutes!


Remove the key from your remote and turn it upside down.

Use a Phillips-head screwdriver to remove the two screws that hold together the two halves of the remote.

Pry apart each half of the remote using your fingers or a flathead screwdriver until they are completely separated into two pieces (you may have to wiggle them around a bit).

Remove both batteries and dispose of them in accordance with local laws (if applicable). Make sure not to mix up or confuse old batteries with new ones!


Remove the key fob from the key ring by pressing down on the clip and sliding it off.

Use a small flathead screwdriver or knife to pry open one end of the battery case, being careful not to break any tabs or cause damage to your device (or yourself!).

Remove old battery, making sure not to touch it with your bare hands—it’s corrosive! Wash hands thoroughly afterward.

Insert new battery following steps 2-3 in reverse order (make sure you don’t get any water in there!)

Step 1

Remove the key fob from the key ring.

Remove the battery cover by unscrewing it using a Phillips head screwdriver or a wrench (depending on your make and model).

Remove the old battery by prying it out with a flat-head screwdriver, being careful not to bend or break any metal pieces inside the compartment when you do so (if applicable).

Replace with new battery, making sure to properly line up its positive terminal with those of its neighbor batteries if applicable (again, depending on your make and model). For safety reasons, we recommend handling only with gloves on!

Replace cover over newly installed batteries; be sure they are firmly secured in place before proceeding to next step!

Reattach key fob back onto keychain as usual; test various functions (such as locking/unlocking doors) until satisfied that everything operates properly!

Step 2

The next step is to remove the battery cover. This can be done easily with a flathead screwdriver, as well as any other similar tool. Simply slide it underneath the edge of the battery cover and lift it up gently until you’ve removed all of its screws.

Once you’ve done this, you’ll be able to see inside your key fob’s interior where there should be another small piece of plastic that covers one end of your battery. Use your screwdriver again in order to remove this small piece so that everything else is exposed completely now including both ends of your old battery

Finally, take out your new replacement batteries (they should have come packaged separately) and replace them with each other so that they make contact with each other in this position before sliding them into place beneath their respective covers

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Step 3

Remove the battery cover by inserting a coin into the slot on either side of the key fob.

Carefully remove your old battery and insert your new one (watch out for static electricity). If you’re not sure which way to insert your battery, compare it to the image provided by Lexus in their instructions. It should look like this:

Replace the cover and test out your newly changed key fob!

Step 4

To change the battery in your Lexus key fob, you’ll need:

A set of small screwdrivers

A pair of needle-nosed pliers

A new battery (any size 2/CR2032)

Step 1:  Using one of your small screwdrivers, remove the two screws on either side of your key fob’s cover plate. Set them aside for later use. Step 2: Use your other small screwdriver to pry open your Lexus key fob’s metal case and remove its circuit board (the black plastic piece with a row of lights on it). Step 3: Using your pliers, remove all four wires connected to this circuit board; they are labelled “1,” “2,” “3,” and “4” by color code (black = 1; white = 2; red = 3; yellow = 4). Step 4: Carefully insert a new CR2032 button battery into place using tweezers or needle-nosed pliers if necessary. Make sure that both sides are making contact with their respective terminals before replacing them back into place!

Lexus Key Fob

You will need to remove the battery cover from your key fob by using a flathead screwdriver or a coin.

Lift up on the battery door and remove it from your Lexus Key Fob.

There are two small tabs at the top of your key fob that hold the old battery in place, so you will have to push them down with your fingers before you can remove the old battery by pulling it out towards you (away from where the two tabs are).

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Take your new alkaline AAA lithium batteries (or rechargeable NiMH batteries if applicable) and put them into their respective slots in your Lexus Key Fob in this order: positive side down first then negative side down lastly; ensure that they are placed correctly by checking out our diagram above if necessary!


In conclusion, it is important to make sure that your key fob is working properly. If you notice any issues with it then you should replace the battery immediately. The replacement process can be done at home by following these steps. Hopefully this article helped you out and if you have any questions or concerns please feel free to leave a comment below!

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About the author


Autofot is a website that blogs on the importance of taking good care of our automobiles. Little things that are ignored matter the most, hence we try to educate car owners and other different auto owners on how to go about taking care of their cars with little or no cost.

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