Replacing a dead Hyundai key fob battery is a relatively simple task that can be accomplished in a few minutes with the right tools. The key fob battery powers the remote functions of the key, such as locking and unlocking the doors, and starting the engine. A dead battery will prevent the key fob from working, which can be a major inconvenience. Replacing the battery is a quick and easy way to get your key fob working again, and it can be done at home with a few simple tools.
The first step is to identify the type of battery that your Hyundai key fob uses. Most Hyundai key fobs use a CR2032 coin cell battery. Once you have identified the type of battery, you can purchase a replacement battery at your local hardware store or online. Next, you will need to remove the old battery from the key fob. To do this, use a small screwdriver to pry open the key fob case. Once the case is open, you will see the battery inside. Use your fingers or a pair of tweezers to remove the old battery.
Now, you can insert the new battery into the key fob. Make sure that the positive (+) side of the battery is facing up. Once the new battery is in place, close the key fob case and screw it shut. Your key fob should now be working again. If it is not, you may need to replace the battery again or there may be another issue with the key fob that needs to be addressed.
Identifying the Battery Type
Determining the correct battery type for your Hyundai key fob is crucial to ensure proper functionality and longevity. Here’s a step-by-step guide to help you identify the right battery:
1. Visual Inspection
Open the key fob by pressing the release button or sliding the cover open. Locate the battery compartment, which is usually marked with a symbol or the word “Battery.” Carefully remove the old battery and note its size, shape, and the numbers or letters printed on it. These markings will typically indicate the battery type.
For instance, if you see CR2025 printed on the battery, it means the replacement battery should be a CR2025 type.
Alternatively, you can refer to the table below for common Hyundai key fob battery types based on key fob model:
| Key Fob Model | Battery Type |
|---|---|
| FOB 2 | CR2025 |
| FOB 4 | CR2032 |
| FOB 5 | CR2016 |
| FOB 6 | CR2025 |
2. Consult the Owner’s Manual
If you have your Hyundai owner’s manual handy, refer to the section on key fob battery replacement. It should provide specific information on the type of battery required.
3. Contact a Hyundai Dealer
If you’re unable to identify the battery type through visual inspection or the owner’s manual, don’t hesitate to contact a Hyundai dealer. They will have access to the latest information on the correct battery for your key fob.
Preparing the Fob for Battery Replacement
Before you begin replacing the battery in your Hyundai key fob, it’s essential to gather the necessary tools and prepare the fob appropriately. Here’s a step-by-step guide:
Step 1: Gather Your Tools
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New CR2032 battery
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Small flathead screwdriver or key
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Clean cloth or tissue
Step 2: Identify and Access the Battery Compartment
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Locate the small notch or groove at the edge of the key fob.
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Use the screwdriver or key to gently pry open the fob at the notch.
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Pull the two halves of the fob apart, taking care not to damage the internal components.
Step 3: Locate and Remove the Old Battery
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Inside the fob, you’ll see a small, round battery. This is the CR2032 battery that needs to be replaced.
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Use a clean cloth or tissue to carefully lift the battery out of its compartment.
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Inspect the battery terminals for any corrosion or debris and clean them if necessary.
Step 4: Prepare the New Battery
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Take the new CR2032 battery and inspect its terminals for any protective film or plastic coating.
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If there’s any coating, peel it off carefully to expose the metal terminals.
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Ensure that the positive (+) terminal on the battery is facing the corresponding terminal in the compartment.
Step 5: Insert the New Battery
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Gently place the new battery into the compartment, ensuring it’s securely seated.
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Press down on the battery slightly to make sure it’s making good contact with the terminals.
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Avoid touching the terminals directly with your fingers, as skin oils can affect the battery’s performance.
Step 6: Reassemble the Key Fob
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Align the two halves of the key fob and snap them back together.
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Ensure the fob is securely closed and the battery compartment is tightly sealed.
Removing the Old Battery
To replace the battery in your Hyundai key fob, you’ll first need to remove the old battery. Here’s a step-by-step guide:
1. Identify the Battery Compartment
Locate the small, rectangular battery compartment on the back of the key fob. It’s typically covered by a plastic cover or held in place by a small screw.
2. Open the Battery Compartment
If the compartment is covered by a plastic cover, gently pry it open using a flat-head screwdriver or a butter knife. If it’s held by a screw, use a small Phillips head screwdriver to remove the screw.
3. Remove the Old Battery
Once the compartment is open, you’ll see the old battery inside. Carefully lift the battery out using your fingernail or a pair of tweezers. Note the orientation of the battery and ensure you position the new battery in the same way.
| Type | Replacement Battery | Location |
|---|---|---|
| Elantra (2011-2016) | CR2032 Coin Battery | Inside the battery compartment on the back of the key fob |
| Sonata (2015-2019) | CR2025 Coin Battery | Inside the battery compartment on the back of the key fob |
| Tucson (2016-2021) | CR2016 Coin Battery | Inside the battery compartment on the side of the key fob |
| Santa Fe (2019-present) | CR2032 Coin Battery | Inside the battery compartment on the back of the key fob |
Once the old battery is removed, you can proceed to insert the new battery and reassemble the key fob.
Inserting the New Battery
Inserting the new battery is a straightforward process. Follow these steps to ensure proper installation:
- Ensure you have the correct replacement battery for your Hyundai key fob.
- Align the new battery with the (+) and (-) terminals marked on the battery compartment.
- Gently push the battery into the compartment until it clicks into place.
- **Secure the Battery:**
- For key fobs with a snap-on cover:
- Locate the small tabs or grooves on the edge of the cover.
- Align the cover with the fob and firmly press down on the tabs until they snap into place.
- For key fobs with a sliding cover:
- Slide the cover over the replacement battery.
- Ensure the cover is fully seated and securely fitted.
- Verify that the key fob is functioning correctly by pressing the buttons.
| Key Fob Type | Battery Type |
|---|---|
| 2-Button Key Fob (Without Smart Key) | CR2032 |
| 3-Button Key Fob (With Smart Key) | CR2025 |
Closing the Key Fob Battery Compartment
Once you’ve replaced the battery, it’s time to close the key fob battery compartment. Here are the detailed steps to ensure a snug and secure closure:
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Align the Key Fob Halves:
Carefully align the two halves of the key fob, ensuring the buttons and the key blade are facing each other.
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Slide the Halves Together:
Gently slide the top half of the key fob over the bottom half, starting from one end. Apply firm but even pressure to ensure a proper fit.
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Secure the Fob:
Once the halves are aligned, press down firmly on the entire surface of the key fob to secure the connection. You should hear or feel a slight click when it’s snapped together.
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Check the Closure:
Give the key fob a gentle shake to make sure it’s securely closed. There should be no rattling or looseness.
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Replace the Screw or Pin:
If your key fob uses a screw or pin to keep the battery compartment closed, locate it and carefully screw or insert it back into place. Tighten it snugly, but avoid overtightening.
Testing the New Battery
Once you’ve inserted the new battery, it’s time to test it out. Here’s how:
| Step 1: | Lock your vehicle using the new key fob. |
|---|---|
| Step 2: | Move at least 20 feet away from the vehicle. |
| Step 3: | Unlock your vehicle using the new key fob. |
| Step 4: | If the vehicle unlocks, your new battery is working properly. |
| Step 5: | If the vehicle does not unlock, repeat steps 1-4 a few more times. |
| Step 6: | If the vehicle still does not unlock, there may be another issue with the key fob or the vehicle’s receiver. In this case, you should contact a professional automotive locksmith or dealership for assistance. |
Tip: If you have a spare key fob, you can also test it out to confirm that the problem is with the original key fob and not the vehicle’s receiver.
Materials Required:
- New CR2032 battery
- Small flathead screwdriver
Steps:
1. Locate the Key Fob’s Battery Compartment:
Typically, the battery compartment is a small, coin-shaped slot located on the back or underside of the key fob.
2. Insert the Screwdriver:
Carefully insert the flathead screwdriver into the designated slot on the battery compartment. Gently pry open the lid.
3. Remove the Old Battery:
Use your finger or a small object to carefully remove the old battery from its housing.
4. Insert the New Battery:
With the positive (+) side facing upwards, insert the new CR2032 battery into the housing. Ensure it fits snugly.
5. Close the Battery Compartment:
Align the lid of the battery compartment and press it down to snap it back into place.
6. Test the Key Fob:
Press a button on the key fob to verify that it is functioning correctly.
Resetting the Key Fob (If Necessary):
In some instances, the key fob may require a reset after the battery replacement. Refer to your vehicle’s owner’s manual for the specific reset procedure, which may involve using the key fob buttons or performing certain vehicle operations.
Troubleshooting Common Battery Issues
1. Weak Battery Symptoms
- Intermittent or slow key fob performance
- Reduced range for keyless entry and ignition
- Malfunctioning buttons
2. Battery Replacement Tips
- Use the correct battery type as specified in your vehicle’s owner’s manual.
- Replace all batteries simultaneously, even if only one is weak.
- Dispose of old batteries responsibly at designated recycling facilities.
3. Step-by-Step Replacement Instructions
- Locate the battery compartment, usually on the back or bottom of the key fob.
- Use a small screwdriver or key to gently pry open the compartment.
- Remove the old batteries and insert the new ones with the positive (+) terminals facing up.
- Close the battery compartment securely.
4. Re-programming Key Fob (If Necessary)
- In some cases, your key fob may need to be re-programmed after a battery change.
- Refer to your vehicle’s owner’s manual for specific re-programming instructions.
5. Common Battery Types
| Key Fob Model | Battery Type |
|---|---|
| Hyundai Sonata (2015-2020) | CR2032 |
| Hyundai Tucson (2019-2023) | CR2025 |
| Hyundai Santa Fe (2017-2022) | CR2016 |
6. Battery Life Expectancy
- Key fob batteries typically last for 2-5 years, depending on usage and environmental factors.
- Excessive cold weather can shorten battery life.
7. Other Battery Issues
- Loose battery contacts
- Battery corrosion
- Damaged key fob circuitry
8. Advanced Troubleshooting
- If your key fob continues to experience issues after replacing the battery, check for the following:
- Loose or damaged wiring in the key fob housing
- Malfunctioning antenna or receiver in the vehicle
- Software or hardware problems within the key fob itself
- Interference from other electronic devices or wireless signals
- Consult with a qualified automotive technician for further diagnosis and repair.
How To Change Hyundai Key Fob Battery
Open the Key Fob
Locate the small notch or button on the side of the key fob. Use a small flat-head screwdriver or your fingernail to gently pry open the case.
Remove the Old Battery
Once the case is open, carefully remove the old battery. Note the orientation of the battery and remove it in the same direction.
Insert the New Battery
Take the new battery and insert it into the key fob with the positive (+) side facing up. Make sure the battery is securely in place.
Close the Key Fob
Align the case halves and gently press them together until they snap shut. Test the key fob to ensure it is functioning properly.
Tips for Extending Key Fob Battery Life
1. Avoid Extreme Temperatures
Extreme heat or cold can damage the battery and reduce its lifespan.
2. Store in a Cool, Dry Place
When not in use, store the key fob in a cool, dry place to prevent battery drain.
3. Use the Key Less Often
Avoid using the key fob for non-essential tasks, such as unlocking the car from a distance.
4. Disable Keyless Entry
If you won’t be using the keyless entry feature for an extended period, disable it to conserve battery life.
5. Use a Protective Case
Consider using a protective case for the key fob to prevent scratches and damage that could drain the battery.
6. Remove the Battery When Not in Use
If you won’t be using the car for an extended period, remove the battery from the key fob to prevent unnecessary drain.
7. Replace the Battery Regularly
Even with proper care, key fob batteries eventually need to be replaced. Typically, batteries should be replaced every 2-3 years.
8. Check for Loose Contacts
Loose contacts can cause the battery to drain prematurely. If the key fob is not working properly, check for loose contacts.
9. Use High-Quality Batteries
Invest in high-quality batteries from reputable brands. Cheap or low-quality batteries may not perform as well and could drain faster.
| Battery Type | Voltage |
|—|—|
| CR2032 | 3V |
| CR2025 | 3V |
| CR2016 | 3V |
Safety Precautions When Handling Batteries
When handling batteries, it is important to take the following safety precautions to avoid injury or damage:
1. Wear Gloves
Always wear gloves when handling batteries to protect your hands from burns or electrical shock in the event of a leak or short circuit.
2. Avoid Contact with Metal
Never touch the metal terminals of batteries with bare hands or metal objects, as this can create a short circuit and cause an explosion or fire.
3. Use the Correct Tools
Only use insulated tools when working with batteries, and avoid using sharp or pointed objects that could puncture the battery casing.
4. Dispose of Batteries Properly
Never dispose of batteries in household trash, as they can pose a fire or explosion hazard. Dispose of them properly at designated battery recycling facilities.
5. Store Batteries Safely
Store batteries in a cool, dry place, away from moisture, heat, and sunlight. Ensure they are out of reach of children and pets.
6. Avoid Mixing Different Battery Types
Never mix different battery types (e.g., alkaline, lithium, zinc) in the same device, as this can cause a chemical reaction leading to leakage or damage.
7. Inspect Batteries Regularly
Periodically inspect batteries for signs of leakage, corrosion, or damage. If any abnormalities are detected, dispose of the batteries immediately.
8. Disconnect Batteries Before Servicing
Always disconnect batteries from devices before performing any maintenance or repairs to avoid accidental shock or short circuits.
9. Use the Proper Voltage Batteries
Ensure that the batteries you use match the voltage requirements of the device they are intended for. Using batteries with incorrect voltage can damage the device.
10. Handle High-Voltage Batteries with Extreme Caution
High-voltage batteries (e.g., above 24 volts) pose a significant risk of injury or fire. Only handle these batteries if you have the necessary training and protective equipment.
How to Change Hyundai Key Fob Battery
Replacing the battery in your Hyundai key fob is a simple task that can be done in a few minutes. Here are the steps on how to do it:
- Locate the small screw on the back of the key fob and remove it.
- Gently pry open the key fob using a small flathead screwdriver or your fingernail.
- Locate the battery and remove it from its compartment.
- Insert the new battery into the compartment, making sure that the positive (+) side of the battery is facing up.
- Close the key fob and replace the screw.
Your Hyundai key fob should now be working again.
People also ask:
How often should I change the battery in my Hyundai key fob?
The battery in your Hyundai key fob should be replaced every 2-3 years.
What type of battery does my Hyundai key fob use?
The type of battery used in Hyundai key fobs varies depending on the model of your car. However, most Hyundai key fobs use a CR2032 battery.
Can I change the battery in my Hyundai key fob myself?
Yes, you can change the battery in your Hyundai key fob yourself. The steps on how to do it are outlined above.
