1. How To Change The Battery In A Toyota Key Fob

2025-01-19

how to

Toyota key fob

Your Toyota key fob is an essential tool that allows you to lock and unlock your vehicle, as well as start the engine. Over time, the battery in your key fob may start to die, which can cause it to malfunction. If you’re experiencing problems with your key fob, one of the first things you should check is the battery. Replacing the battery in a Toyota key fob is a relatively simple process that can be done in just a few minutes. In this article, we’ll provide you with step-by-step instructions on how to change the battery in a Toyota key fob.

Before you begin, you’ll need to gather a few tools. You’ll need a small Phillips head screwdriver, a new CR2032 battery, and a clean cloth. Once you have your tools, you can follow these steps to change the battery in your Toyota key fob:

Locate the small screw on the back of the key fob.
Use the Phillips head screwdriver to remove the screw.
Gently pry open the back of the key fob.
Locate the old battery and remove it.
Insert the new battery into the key fob, making sure that the positive side of the battery is facing up.
Snap the back of the key fob back into place.
Tighten the screw to secure the back of the key fob.

Once you’ve replaced the battery, your key fob should be working again. If you’re still experiencing problems, you may need to take your key fob to a Toyota dealer for further diagnosis.

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Tools Required

Replacing the battery in a Toyota key fob is a simple task that can be completed in just a few minutes. You will need the following tools:

Flathead Screwdriver

A small flathead screwdriver is essential for removing the battery cover from the key fob. The screwdriver must be small enough to fit into the slot on the cover.

Phillips Head Screwdriver

In some cases, you may also need a small Phillips head screwdriver to remove the screws that hold the battery in place.

New Battery

You will need a new battery that is compatible with your Toyota key fob. The type of battery will vary depending on the model of your Toyota. You can find the correct battery type by consulting your Toyota’s owner’s manual.

Optional: Key Fob Cover

If the battery in your key fob is dead, you may also want to replace the key fob cover. Key fob covers are available in a variety of colors and materials, and they can help to protect your key fob from damage.

Tool	Purpose
Flathead Screwdriver	Removing the battery cover
Phillips Head Screwdriver	Removing the screws that hold the battery in place
New Battery	Replacing the old, dead battery
Key Fob Cover	Protecting the key fob from damage

Identifying the Key Fob

Before you can change the battery in your Toyota key fob, you need to identify it. Key fobs vary in design depending on the model year and trim level of your Toyota. However, there are some general characteristics that can help you identify it:

It is a small, handheld device that is typically black or gray in color.
It has several buttons on the front, such as the lock, unlock, and trunk buttons.
It has a Toyota logo on the front or back.

If you are still unable to identify your key fob, you can consult your Toyota owner’s manual or contact a Toyota dealership for assistance.

Opening the Key Fob

Locating the battery within your Toyota key fob requires carefully disassembling the device. The disassembly process differs slightly depending on the specific model of Toyota vehicle you own. However, general steps can be followed to successfully open the fob and access the battery:

1. Locate the release button.

Most Toyota key fobs feature a small, concealed release button that allows you to detach the key blade from the fob body. This button is typically found along the edge of the fob, near the keychain attachment point. Using a small pointed object, such as a toothpick or the tip of a pen, gently press the release button and pull the key blade away from the fob body.

2. Separate the fob halves.

With the key blade removed, you will be left with the electronic fob body. To separate the halves of the fob, carefully insert a small, flat object, such as a thin screwdriver or a butter knife, into the seam of the fob. Gently pry the halves apart, being careful not to damage any of the internal components.

3. Locate and remove the battery.

Once the fob is open, you will see the battery. It is usually a small, round, coin-shaped battery, typically a CR2032 or CR2025 battery. The battery may be held in place by a small clip or bracket. Carefully remove the battery from the fob, being mindful of its polarity (the positive and negative terminals) to ensure proper installation of the new battery.

Button	Function
Release Button	Detaches the key blade from the fob body.
Seam	Where the fob halves are separated.
Battery	A small, round, coin-shaped battery.
Clip/Bracket	Holds the battery in place.

Locating and Removing the Old Battery

Step 1: Identify the Key Fob Type

* Determine the specific key fob model for your Toyota vehicle. * Refer to your vehicle’s owner’s manual or online resources to locate the correct battery type.

Step 2: Locate the Battery Compartment

* Examine the back or side of the key fob for a small compartment door. * Depending on the model, the door may be held in place by a screw or a latch.

Step 3: Open the Battery Compartment

* Use a small screwdriver or coin to carefully pry open the compartment door. * Avoid using excessive force to prevent damaging the key fob.

Step 4: Remove the Old Battery

* Locate the old battery inside the compartment. It is typically a small, coin-shaped battery. * Use tweezers or a small needle to gently remove the battery by prying it out. * Note: Dispose of the old battery responsibly and in accordance with local regulations to avoid environmental contamination. Please refer to the following table for the battery type and dimensions commonly used in Toyota key fobs:

Battery Type	Dimensions
CR2025	15.50mm x 3.00mm x 1.65mm
CR2032	20.00mm x 3.20mm x 2.00mm
CR1616	16.00mm x 1.60mm x 1.60mm

Inserting the New Battery

Firstly, you may notice that some Toyota key fobs have a small notch or a designated area to pry open the key. If yours has this notch or area, insert the tip of your key or a flathead screwdriver into the notch and gently pry the key fob open. Other Toyota key fobs may require you to press a small button on the side to release the back cover.

Once the key fob is open, you’ll see the circuit board and the battery. Carefully remove the old battery, paying attention to its orientation. The new battery must be inserted with the correct polarity, so make sure the positive (+) side of the battery faces the same direction as the positive (+) marking on the circuit board.

Now, insert the new battery into the key fob, making sure it fits snugly. Double-check the polarity to ensure it’s correct. Once the battery is in place, carefully reassemble the key fob by snapping the back cover back on or pressing the button to close it. Ensure the key fob is securely closed before testing it.

Battery Type	Toyota Key Fob Models
CR2025	Camry, Corolla, RAV4, Tacoma, Tundra
CR2032	Avalon, Highlander, Land Cruiser, Prius, Sequoia

Note that some newer Toyota vehicles may use different battery types, so it’s always best to check your owner’s manual or consult a Toyota dealership for the correct battery for your specific key fob model.

Closing the Key Fob

Carefully place the metal backplate onto the key fob, matching its edges and notches with the key fob body. Ensure that the small notch at the bottom of the backplate aligns correctly with the corresponding protrusion on the key fob body.
Slide the backplate down into place, applying gentle pressure along its edges. Ensure that the backplate fully seats into the key fob body and fits snugly.
Once the backplate is secure, gently press down on the key fob buttons to check if they are working properly. If any button feels stuck or doesn’t respond, you may need to repeat the steps to ensure proper seating of the components.
Secure the key fob by snapping the two halves together. The key fob should close with a satisfying click, indicating a secure connection.
Double-check that the key fob buttons are functioning correctly and that the battery is securely installed. If you encounter any issues or the key fob still doesn’t work, refer to your vehicle’s owner’s manual or consult a Toyota dealership for further assistance.

Replacing the Key Fob Battery in Different Toyota Models

Toyota key fobs are crucial for locking, unlocking, and starting your vehicle remotely. Over time, the battery in your key fob may need replacing, and the process can vary depending on your Toyota model.

2016-2022 Toyota Tacoma

Locate the small release button on the back of the key fob.
Press the button and slide the cover open.
Remove the old CR2032 battery and insert the new one with the positive (+) side facing up.
Slide the cover back on and press it firmly to close.

2018-2022 Toyota Camry

Press the small button on the side of the key fob to release the emergency key.
Pull the emergency key and use it to pry open the seam on the back of the fob.
Replace the old CR1632 battery with a new one.
Press the fob halves together to close.

2020-2022 Toyota Highlander

Use your fingernail or a small tool to pry open the small cover at the bottom of the key fob.
Remove the old CR2025 battery and replace it with a new one.
Push the cover back into place.

2019-2022 Toyota RAV4

Press the button on the side of the key fob to release the emergency key.
Pry open the seam on the back of the fob using the emergency key.
Replace the old CR2016 battery with a new one.
Snap the fob halves back together.

Troubleshooting Common Issues

The fob is not unlocking or locking the car.

First, check if the fob’s battery is dead. If it is, replace the battery. If the battery is not dead, try resetting the fob by removing the battery for 30 seconds and then reinserting it. If the fob still does not work, there may be a problem with the car’s receiver. In this case, you will need to take the car to a mechanic to have it repaired.

The fob is working intermittently.

If the fob is working intermittently, it may be due to a weak battery. Replace the battery and see if that solves the problem. If it does not, there may be a problem with the fob’s circuitry. In this case, you will need to take the fob to a mechanic or locksmith to have it repaired.

The fob is not opening the trunk.

The trunk release button on the fob may need to be programmed. Consult your vehicle’s owner’s manual for instructions on how to program the trunk release button.

The fob is not starting the car.

Make sure that the car is in park and that the key is in the ignition. If the car is not in park or the key is not in the ignition, the fob will not start the car. If the car is in park and the key is in the ignition, try replacing the battery in the fob. If that does not work, there may be a problem with the car’s ignition system. In this case, you will need to take the car to a mechanic to have it repaired.

The fob’s buttons are not working.

If the fob’s buttons are not working, try cleaning the buttons with a cotton swab dipped in rubbing alcohol. If that does not work, there may be a problem with the fob’s circuitry. In this case, you will need to take the fob to a mechanic or locksmith to have it repaired.

The fob is damaged.

If the fob is damaged, it may not work properly. If the fob is badly damaged, you may need to replace it. Consult your vehicle’s owner’s manual for instructions on how to replace the fob.

Battery Type	Size	Voltage
CR2032	20mm x 3.2mm	3V
CR2025	20mm x 2.5mm	3V
CR1632	16mm x 3.2mm	3V

Safety Precautions

Before you start, here are some safety precautions to keep in mind:

Park the vehicle in a safe location and turn off the engine.
Disconnect the negative terminal of the battery to prevent electrical shock.
Locate the key fob and remove it from the ignition.
Use caution when handling the key fob, as it contains delicate components.
Avoid touching the battery with your bare hands, as this can damage it.
Do not dispose of the old battery in the trash, as it can pose a fire hazard. Instead, recycle it at a designated recycling facility.
Follow the instructions in this guide carefully to avoid damaging the key fob or voiding its warranty.
If you are unsure about any part of the process, consult with a qualified mechanic.
Keep the new battery out of reach of children, as it can pose a choking hazard.
Dispose of the old battery properly according to local regulations.

How to Change the Battery in a Toyota Key Fob

Changing the battery in a Toyota key fob is a simple and straightforward process that can be completed in just a few minutes. Here are the steps involved:

Locate the small button on the back of the key fob.
Press the button and pull the key out of the fob.
Flip the key over and locate the small screw on the back.
Use a small Phillips head screwdriver to remove the screw.
Open the key fob and locate the battery.
Remove the old battery and insert the new one.
Close the key fob and replace the screw.
Insert the key back into the fob and press the button to close it.