When your Lexus key fob starts to act up, it’s usually a sign that the battery is dying. Replacing the battery is a quick and easy process that you can do yourself in just a few minutes. Here’s a step-by-step guide on how to change a Lexus key fob battery:
First, you’ll need to gather a few tools. You’ll need a small Phillips head screwdriver, a new CR2032 battery, and a soft cloth. Once you have your tools, you can start by removing the key from the fob. There is usually a small button on the side of the fob that you can press to release the key. Once the key is removed, you’ll see a small screw on the back of the fob. Use the screwdriver to remove the screw and then gently pry open the fob. Be careful not to damage the fob or the circuit board inside.
Identifying the Correct Battery Type
The first step towards replacing your Lexus key fob battery is identifying the correct battery type. Different Lexus models and key fob designs may require different batteries, so it’s important to determine the precise requirements for your specific model.
Refer to the owner’s manual or check online resources to find the recommended battery type for your Lexus key fob. You can also visit a reputable automotive parts store and provide them with the year, make, and model of your Lexus; they can assist you in locating the correct battery.
Battery types for Lexus key fobs generally fall within the CR series (such as CR2025, CR2032, or CR1632) or the LIR series (such as LIR2025 or LIR2032). Pay careful attention to the battery specifications to ensure compatibility with your key fob.
Here’s a table summarizing some of the common battery types used in Lexus key fobs:
| Lexus Model | Key Fob Design | Battery Type |
|---|---|---|
| ES 2016-2023 | 3-button flip key | CR2025 |
| RX 2016-2023 | 4-button smart key | CR2032 |
| LX 2016-2023 | Smart access key | LIR2032 |
Using a Key or Small Tool to Open the Battery Compartment
Locate the small notch or groove on the side of the key fob. This is usually a small, recessed area that is designed to fit the blade of a key or a small tool.
Insert the blade of a key or a small screwdriver into the notch and gently pry open the battery compartment. The compartment should open with minimal force, so do not use excessive force.
Once the battery compartment is open, carefully lift the battery out of its socket. The battery is usually held in place by a small spring or clip, so be careful not to damage these components when removing the battery.
Inserting the New Battery
Now that the old battery has been removed, it’s time to insert the new one. Carefully align the positive (+) and negative (-) terminals of the new battery with the corresponding terminals in the key fob. Ensure that the battery is firmly seated in place and that the terminals are making good contact.
Refer to the table below for the recommended battery type for specific Lexus key fob models:
| Lexus Key Fob Model | Battery Type |
|---|---|
| GS300, GS430 (2006-2011) | CR2025 |
| RX330, RX350, RX400h (2004-2009) | CR2032 |
| ES350 (2007-2012) | CR2016 |
| IS250, IS350 (2006-2013) | CR2025 |
Once the new battery is securely in place, reassemble the key fob by snapping the back cover back onto the front cover. Make sure the cover is firmly locked in place.
Test the key fob to ensure that it is functioning correctly. If the buttons are working and the key fob is able to unlock and lock the vehicle, the battery replacement process is complete.
Closing the Battery Compartment
To close the battery compartment, follow these steps:
- Align the cover with the base of the key fob.
- Apply gentle pressure to the cover until it clicks into place.
- Slide the cover towards the end of the key fob until it is fully closed.
To ensure the battery compartment is securely closed, lightly shake the key fob. If you hear any loose rattling, repeat the closing steps to secure the cover more firmly.
Here’s a detailed table explaining the closing process:
| Step | Description |
|---|---|
| 1 | Align the cover with the base of the key fob |
| 2 | Apply gentle pressure to the cover until it clicks into place |
| 3 | Slide the cover towards the end of the key fob until it is fully closed |
Checking Key Fob Functionality
To assess the status of your key fob, embark on the following troubleshooting steps:
1. **Confirm visual indicators:** Inspect the fob for any apparent damage or corrosion.
2. **Check the buttons:** Press each button firmly to verify their responsiveness.
3. **Test the range:** Stand approximately 20 feet from your Lexus and attempt to lock and unlock the vehicle using the fob.
4. **Try a spare fob:** If available, try using a spare key fob to rule out issues specific to the original.
5. **Check for interference:** Remove any metal objects or electronic devices from your proximity to eliminate potential signal interference.
6. **Test the battery:** Use a multimeter to measure the voltage of the battery in your key fob. A reading below 3 volts typically indicates a depleted battery.
7. **Consider the following troubleshooting table for specific symptoms and recommendations:
| Symptom | Recommendation |
|---|---|
| Fob buttons not working | – Replace the battery. – Check for fob damage. |
| Fob has limited range | – Replace the battery. – Move closer to the vehicle. – Eliminate signal interference. |
| Fob does not lock/unlock the vehicle | – Try a spare fob. – Check for receiver issues in the vehicle. |
Troubleshooting Battery Replacement Issues
The Key Fob Is Not Working After Battery Replacement
If the key fob is still not working after replacing the battery, there could be a few reasons why.
- Battery Installation Error: Ensure the battery is installed correctly, with the positive (+) side facing up.
- Faulty Battery: The new battery may be defective. Try installing a new one.
- Transmitter Malfunction: The transmitter inside the key fob may be faulty. Contact a qualified mechanic or locksmith for assistance.
- Receiver Problem: The receiver in the car that communicates with the key fob may be malfunctioning. Consult a mechanic.
- Key Fob Desynchronization: The key fob may have become desynchronized from the car. Refer to the owner’s manual for reprogramming instructions.
The Key Fob Works Intermittently
If the key fob intermittently works, it could indicate:
- Weak Battery: The battery may be nearing the end of its life. Replace it with a new one.
- Faulty Key Fob: The key fob itself may be damaged or malfunctioning. Consider consulting a mechanic or locksmith.
- Interference: Metal objects, electronic devices, or strong magnetic fields can interfere with key fob signals. Try moving to a different location or removing potential sources of interference.
The Key Fob Range Is Limited
If the key fob’s range seems limited, consider these factors:
- Battery Strength: A weak battery can reduce the range of the key fob’s signal.
- Obstacles: Walls, buildings, and other large objects can obstruct the signal.
- Interference: As mentioned earlier, interference from other electronic devices can affect the range.
- Transmitter Issue: A malfunctioning transmitter in the key fob can limit its range. Seek professional assistance.
Precautions to Observe When Replacing the Fob Battery
To ensure a smooth and safe battery replacement process, kindly adhere to the following precautions:
- Handle the Fob Gently: Avoid applying excessive force or dropping the fob, as these actions could damage its delicate components.
- Keep Unauthorized Individuals Away: Prevent unauthorized access to the fob, especially if it contains sensitive information like your home address or personal data.
- Safely Dispose of the Old Battery: Avoid discarding the old battery in regular household waste. Instead, recycle or dispose of it responsibly through designated hazardous waste disposal channels.
- Use the Correct Battery Type: Ensure that you use the manufacturer-recommended battery type. Different fob models may require specific battery sizes or specifications, so it’s crucial to consult the user manual or contact a qualified technician for guidance.
- Check the Battery Properly: Inspect the new battery thoroughly before installation to ensure it is not damaged or defective. A faulty battery can lead to premature discharge or potential damage to the fob.
- Avoid Shorting the Contacts: When handling the new battery, be cautious not to short-circuit its terminals by touching them with bare hands or conductive materials. Short-circuiting can result in battery damage or even fire.
- Clean the Contact Points: Over time, dirt or corrosion may accumulate on the fob’s contact points, hindering the battery’s proper function. Gently clean these points using a soft brush or cotton swab dipped in rubbing alcohol.
- Reinsert the Battery Correctly: Pay attention to the polarity of the new battery (+ and -) and ensure it is inserted correctly into the fob. Incorrect battery insertion can damage the fob and compromise its functionality.
| Battery Type | Compatible Fob Models |
|---|---|
| CR2032 | LX 570 (2016-2023), GS 350/450h (2013-2018), NX 200t/300h (2015-2021) |
| CR2025 | ES 350/300h (2013-2018), IS 250/350/300h (2014-2020), RC 200t/300/350 (2015-2020) |
Additional Tips
If you encounter any difficulties during the battery replacement process, don’t hesitate to seek assistance from a qualified technician or refer to the manufacturer’s instructions. Additionally, regular maintenance and timely battery replacement can help extend the lifespan of your Lexus key fob and ensure its optimal performance over time.
How to Change a Lexus Key Fob Battery
Replacing the battery in a Lexus key fob is a simple process that can be done in just a few minutes. Here’s a step-by-step guide on how to do it:
- Locate the key fob’s battery compartment. On most Lexus key fobs, the battery compartment is located on the back of the fob. There may be a small button or lever that you need to press to release the cover.
- Remove the old battery. Once you’ve opened the battery compartment, remove the old battery. It should be a small, button-shaped battery.
- Insert the new battery. Take the new battery and insert it into the compartment with the positive (+) side facing up.
- Close the battery compartment. Once the new battery is in place, close the battery compartment and secure it. You may need to press a button or lever to do this.
That’s it! You’ve successfully replaced the battery in your Lexus key fob.
People Also Ask About How to Change a Lexus Key Fob Battery
How often should I change the battery in my Lexus key fob?
The battery in a Lexus key fob typically lasts for 2-3 years. However, if you notice that the key fob is not working properly, you may need to replace the battery sooner.
What type of battery does a Lexus key fob use?
Most Lexus key fobs use a CR2032 battery. However, some older models may use a CR2025 battery.
Where can I buy a replacement battery for my Lexus key fob?
You can buy a replacement battery for your Lexus key fob at most hardware stores or online retailers.
