Maintaining a functional Hyundai key is essential for ensuring convenient vehicle access. However, over time, the key battery may deplete, hindering its performance. Fortunately, replacing the Hyundai key battery is a straightforward task that every vehicle owner can accomplish with minimal effort. By following a few simple steps and utilizing everyday household tools, you can restore your Hyundai key to full functionality in minutes, saving you the inconvenience and expense of visiting an automotive locksmith or dealership.
To initiate the battery replacement process, you will require a flat-head screwdriver or a small, pointed object like a paperclip. Begin by locating the small screw or release button situated on the back of the key fob. Carefully insert the screwdriver or paperclip into the designated slot and gently pry the key fob open. Once the key fob is separated into two halves, you will gain access to the battery compartment. Use a pair of tweezers or your fingers to cautiously remove the old battery. Note the orientation of the battery, as it must be inserted correctly to ensure proper functioning.
Next, align the new battery with the terminals inside the compartment, ensuring the positive (+) and negative (-) ends correspond with the markings on the battery holder. Securely insert the new battery into place, making certain it sits flush within the compartment. Reassemble the key fob by snapping the two halves together, ensuring they fit snugly. Finally, test the key fob by pressing a button. If the key fob illuminates or triggers a response from the vehicle, you have successfully replaced the battery.
Gathering Necessary Tools
Before you begin the process of changing your Hyundai key battery, it’s essential to gather all the necessary tools and materials. Here’s a detailed list of what you’ll need:
1. CR2032 Coin Battery
The Hyundai key fob typically uses a CR2032 coin battery. This small, round battery is commonly used in various electronic devices, including car key fobs. Ensure you purchase the correct battery type to avoid any compatibility issues.
2. Screwdriver (Optional)
Depending on the model and year of your Hyundai, you may or may not need a screwdriver to open the key fob. Some fobs have a small screw that needs to be removed to access the battery compartment, while others have a snap-on design that can be opened by hand.
If your key fob requires a screwdriver, choose a small flathead or Phillips screwdriver that fits the screw size. Avoid using excessive force when unscrewing to prevent damage to the key fob.
3. Soft Cloth or Paper Towel
A soft cloth or paper towel is useful for cleaning any dust or debris from the battery compartment and the battery contacts. A clean surface will ensure good electrical contact and prevent future issues.
4. Gloves (Optional)
Wearing gloves while handling the battery is recommended to prevent any static discharge or accidental contact with the battery terminals. However, it’s not mandatory unless you have concerns about electrostatic discharge.
5. New Key Fob (Optional)
If the battery change does not resolve any issues with your key fob or if the fob is damaged, you may need to replace the entire key fob. Contact your local Hyundai dealership or an authorized locksmith for a new key fob.
Removing the Key Fob Cover
Using a Small Screwdriver
1. Locate the small, hidden screw that holds the key fob cover in place. This screw is typically located either on the side or back of the fob.
2. Insert the tip of a small flat-head or Phillips screwdriver into the screw and carefully turn it counterclockwise to loosen it. Do not overtighten or strip the screw.
3. Once the screw is loose, gently pry open the key fob cover using your fingers or a plastic tool. Be careful not to damage the delicate plastic parts inside.
Using a Key or Coin
1. Inspect the key fob for a small notch or slot designed for opening the cover. This is usually located on one of the edges.
2. Insert the edge of a key or a small coin into the notch and gently pry open the cover. Use cautious leverage to avoid breaking the cover.
3. Once the cover is partially open, use your fingers to separate it completely from the fob.
Specific Instructions for Various Hyundai Key Fob Models
| Model | Cover Removal Method |
|---|---|
| Hyundai Elantra (2017-2022) | Use a flat-head screwdriver to remove the screw on the back of the fob |
| Hyundai Sonata (2015-2023) | Use a Phillips screwdriver to remove the screw on the side of the fob |
| Hyundai Tucson (2016-2022) | Use a key or coin to pry open the cover from the notch on the side |
| Hyundai Santa Fe (2019-2022) | Use a small flat-head screwdriver to remove the screw on the back of the fob |
| Hyundai Palisade (2020-2023) | Use a Phillips screwdriver to remove the screw on the side of the fob |
Additional Tips
* Handle the key fob carefully to avoid damaging its delicate components.
* If you encounter any difficulties opening the cover, seek professional assistance from a locksmith or Hyundai dealership.
* Keep the screw in a safe place to prevent it from getting lost.
* After replacing the battery, press all buttons on the key fob to ensure proper functionality.
Inserting the New Battery
Once you have retrieved the battery compartment, it is now time to insert the new battery. However, before you do so, it is important to take a brief moment to ensure that the new battery is properly oriented. The positive end of the battery should be facing upward, towards the top of the compartment. The negative end of the battery should be facing downward, towards the bottom of the compartment. If you install the battery in the wrong orientation, it will not work properly and could damage the key fob.
With the battery properly oriented, carefully slide it into the compartment. You should feel a slight click as the battery snaps into place. Once the battery is in place, use your finger to gently press down on it to ensure that it is securely fastened.
Tips for Inserting the New Battery
- Use a clean cloth or tissue to handle the battery. This will help to prevent dirt or oil from getting on the battery terminals.
- Do not touch the battery terminals with your bare hands. This could cause the battery to short circuit.
- If you are having difficulty inserting the battery, try using a small pair of tweezers to gently nudge it into place.
- Once the battery is inserted, use your finger to gently press down on it to ensure that it is securely fastened.
| Battery | Orientation |
|---|---|
| CR2032 | Positive (+) side facing up |
| CR1620 | Positive (+) side facing up |
| CR2025 | Positive (+) side facing up |
How to Change Hyundai Key Battery
Step 1: Gather Materials
You will need a new CR2032 coin battery, a small flathead screwdriver or key, and a clean work surface.
Step 2: Remove the Key from the Fob
Locate the small button on the back of the key fob. Press and hold the button while pulling the key straight out of the fob.
Step 3: Remove the Back Cover
Use the flathead screwdriver to gently pry open the back cover of the key fob. Start at the corner and work your way around until the cover comes off.
Step 4: Remove the Old Battery
Locate the old battery in the battery compartment. Use your fingernail or a sharp object to gently lift the battery out.
Step 5: Insert the New Battery
Place the new battery in the battery compartment with the positive (+) side facing up. Make sure the battery is aligned correctly.
Aligning the Battery Properly
The positive (+) side of the battery should be facing the side of the key fob with the metal contacts. The negative (-) side of the battery should be facing the side of the key fob with the plastic back cover.
To ensure proper alignment, follow these steps:
1. Make sure the positive (+) side of the battery is aligned with the metal contacts on the key fob.
2. Gently press down on the battery until it clicks into place.
3. Inspect the battery to make sure it is seated correctly and not touching any metal components.
Step 6: Replace the Back Cover
Align the back cover with the key fob and gently snap it into place. Make sure the cover is secure and there are no gaps around the edges.
Step 7: Test the Key Fob
Press the lock or unlock button on the key fob to test if it is working properly. If the key fob is not responding, check the battery alignment and connections.
Step 8: Re-attach the Key
Insert the key back into the key fob until it clicks into place.
Step 9: Clean the Key Fob
Use a damp cloth to gently wipe down the key fob and remove any dirt or debris.
Step 10: Store the Key Fob
Store the key fob in a dry and safe place. Avoid exposing it to extreme heat or moisture.
Replacing the Battery Compartment Cover
Once you have successfully removed the key blade and accessed the battery compartment, it’s time to replace the cover. This step is crucial to ensure the proper functioning and protection of the key’s battery and electronic components.
Here’s a detailed guide on how to replace the battery compartment cover:
1. Aligning the Cover
Carefully align the replacement cover over the battery compartment. Make sure it fits snugly and securely without any gaps or misalignments.
2. Sliding the Cover in Place
Once you have aligned the cover, gently slide it back into place. Apply a slight amount of pressure to ensure it is firmly seated.
3. Applying Pressure
Use your fingers or a small tool, such as a screwdriver or needle, to apply gentle pressure around the edges of the cover. This will help it snap into place properly.
4. Checking for a Secure Fit
Wiggle or pull on the cover slightly to check if it is secure and won’t come loose. If it moves or comes apart, repeat steps 2 and 3.
5. Inspecting the Fit
Visually inspect the cover to ensure it fits flush with the key body and there are no gaps or protrusions.
6. Testing the Key
Insert the key into the ignition or door lock and turn it to make sure it functions correctly. If the key does not work or if there are any issues, check the battery and connections again.
7. Storing the Spare Cover
If you replaced the cover with a spare, remember to store the old or damaged cover safely for future use or as a backup.
8. Additional Tips for Replacing the Cover
– Avoid using excessive force when replacing the cover, as it can damage the plastic components.
– If the cover is difficult to slide in, check for any obstructions or debris that may be preventing it from fitting properly.
– Use a soft cloth or tissue to clean any dirt or grime from the cover before installing it.
– If the cover still doesn’t fit properly or the key malfunctions after replacing it, consult a professional locksmith or your vehicle’s dealership for assistance.
9. Troubleshooting Battery Compartment Cover Issues
If you encounter problems with the battery compartment cover, here are some common issues and solutions:
| Issue | Solution |
|---|---|
| Cover won’t slide in | Check for debris or obstruction. Ensure the cover is aligned correctly. |
| Cover falls off easily | Replace the cover with a new one. Ensure it is firmly seated and snaps into place. |
| Battery falls out | Replace the battery compartment cover. Ensure it fits tightly and is not damaged. |
10. Importance of a Secure Battery Compartment Cover
A properly fitted battery compartment cover is essential for several reasons:
– It protects the battery from physical damage and prevents it from falling out.
– It ensures a secure connection between the battery and the key’s electronic components.
– It guards against moisture and dust, which can damage the battery and electronics.
Tightening the Screws
After replacing the battery in your Hyundai key, it’s crucial to tighten the screws securely. This step ensures that the key fob remains intact and functions properly. Here are detailed instructions on how to tighten the screws:
Locating the Screws
There are typically two small screws located on the back of the key fob. Identify these screws carefully, as they may be hidden by a small rubber cover or clip.
Using the Correct Tool
To tighten the screws, you will need a precision screwdriver that fits the size of the screw heads. Using the wrong screwdriver can damage the screws or the key fob itself.
Applying Pressure Evenly
Once you have the correct screwdriver, carefully insert it into the screw head and apply even pressure. Avoid overtightening, as this can strip the screws or damage the key fob.
Tightening the Screws Fully
Continue tightening the screws until they are snug but not too tight. The key fob should feel secure when you hold it in your hand, without any rattling or loose parts.
Inspecting the Screws
After tightening the screws, inspect them to ensure they are securely fastened. If any screws are loose, tighten them further until they are secure.
Replacing the Cover
If there was a rubber cover or clip that concealed the screws, carefully replace it to protect the key fob and maintain its aesthetics.
Tips for Tightening Screws
- Use a screwdriver with a magnetized tip to prevent the screws from falling out.
- Apply a small amount of thread-locking adhesive to the screws before tightening them to enhance their stability.
- If you encounter any difficulty tightening the screws, consult a qualified locksmith or mechanic.
Table: Screw Tightening Specifications
| Screw Type | Tightening Torque |
|---|---|
| Hyundai Sonata Key Fob | 0.8 Nm (7 in-lbs) |
| Hyundai Elantra Key Fob | 0.6 Nm (5 in-lbs) |
| Hyundai Tucson Key Fob | 1.0 Nm (9 in-lbs) |
Note: The tightening torque values provided in the table are approximate and may vary slightly depending on the key fob model and year. Refer to your Hyundai owner’s manual for specific recommendations.
Testing the Key Battery
To determine if your Hyundai key battery needs replacement, you can perform a simple test. Here are the detailed steps:
- Remove the physical key: Most Hyundai keys have a flip-out or removable physical key blade. Press the release button or lever to detach the key blade from the transmitter.
- Locate the battery: Inside the key transmitter, you will find a small, round or flat battery. The battery type may vary depending on your Hyundai model, but it is typically a CR2025 or CR2032 coin cell battery.
- Inspect for damage: Examine the battery for any physical damage, such as rust, corrosion, or leakage. If the battery appears damaged, it should be replaced immediately.
- Use a multimeter: You can use a multimeter to accurately measure the battery’s voltage. Set the multimeter to the “DC Voltage” setting and connect the probes to the positive (+) and negative (-) terminals of the battery. A healthy battery should have a voltage reading of around 3 volts. A battery with a voltage below 2.7 volts is considered discharged and needs replacement.
- Test the key functions: If you do not have access to a multimeter, you can also test the battery by attempting to use the key’s functions. If the key intermittently operates the door locks, trunk, or ignition, it is likely that the battery is weak and needs to be replaced.
Additional Battery Details
Here are some additional details about the Hyundai key battery:
| Battery Type | Typical Voltage |
|---|---|
| CR2025 | 3 volts |
| CR2032 | 3 volts |
Cleaning the Key Fob
Over time, dirt and debris can accumulate on the key fob, affecting its functionality. Regular cleaning is crucial to maintain its optimal performance.
1. Gather Materials
* Soft cloth or microfiber towel
* Isopropyl alcohol (70% or higher)
* Cotton swabs or Q-tips
* Toothpick or SIM card removal tool
2. Wipe Exterior
* Gently wipe the exterior of the key fob with a soft cloth or microfiber towel to remove loose dirt and dust. Do not submerge the fob in water.
3. Use Isopropyl Alcohol
* Dampen a cotton swab or Q-tip with isopropyl alcohol and gently clean the buttons, crevices, and edges of the fob. Isopropyl alcohol helps dissolve and remove stubborn dirt and grime.
4. Clean Button Contacts
* Use a toothpick or SIM card removal tool to gently scrape away any corrosion or debris from the metal contacts on the back of the fob where it makes contact with the vehicle.
5. Clean Fob Body
* If necessary, use a soft cloth or cotton swab dampened with isopropyl alcohol to clean the inside and outside of the fob body. Avoid using excessive alcohol, as it can damage the fob’s components.
6. Dry Thoroughly
* Let the key fob air dry completely before using it again. Any remaining moisture can damage the fob’s electronics.
Here is a table summarizing the cleaning steps:
| Step | Action |
|---|---|
| 1 | Gather materials |
| 2 | Wipe exterior |
| 3 | Use isopropyl alcohol |
| 4 | Clean button contacts |
| 5 | Clean fob body |
| 6 | Dry thoroughly |
Steps on How to Change Hyundai Key Battery
Materials Needed
- New key battery (check your owner’s manual for the correct type)
- Small flathead screwdriver or keyhole tool
- Optional: Spare key (for programming)
Instructions
1. Locate the Key Release Button
There is a small button located on the back or side of the key fob. Press and hold this button to release the mechanical key.
2. Remove the Mechanical Key
Pull out the mechanical key from the key fob.
3. Open the Key Fob
Use the small flathead screwdriver or keyhole tool to pry open the key fob. You will hear a clicking sound as the case separates.
4. Locate the Battery
The battery is usually a small, coin-shaped disc nestled in the key fob.
5. Remove the Old Battery
Carefully remove the old battery using the flathead screwdriver or your fingernail.
6. Close the Key Fob
Align the two halves of the key fob and press firmly to snap it back together.
7. Insert the Mechanical Key
Slide the mechanical key back into the key fob.
Programming the Key (if necessary)
Some Hyundai keys may require programming after a battery change. Here’s how to do it:
Manual Programming
- Get a spare key that is already programmed.
- Insert the spare key into the ignition and turn it to the “On” position, but do not start the car.
- Remove the spare key and insert the newly replaced battery key within 30 seconds.
- Turn the ignition to the “On” position again and back to “Off” two times. Leave it on “On” the third time.
- Lock and unlock the doors with the newly programmed key within 10 seconds.
- Remove the key and test if it works.
Dealer or Locksmith Programming
If manual programming does not work, you can visit a Hyundai dealership or locksmith to have the key programmed professionally.
8. Test the Key
Lock and unlock your car using the remote buttons on the key fob to ensure it works properly.
9. Dispose of the Old Battery
Dispose of the old battery according to your local regulations. It may contain harmful chemicals.
10. Additional Tips
- Use a fresh battery for optimal performance.
- Replace the battery promptly when you notice a decrease in signal range or button responsiveness.
- Keep your key fob away from extreme heat or cold, as it can damage the battery.
11. Safety Precautions
- Do not insert any sharp objects into the key fob, as this can damage the circuitry.
- Avoid touching the battery terminals with your bare hands, as the oil from your skin can cause corrosion.
- If you experience any difficulty changing the battery or programming the key, consult a professional.
Battery Types for Hyundai Keys
| Model | Battery Type |
|---|---|
| Elantra (2006-2016) | CR2025 |
| Sonata (2006-2019) | CR2032 |
| Tucson (2005-2015) | CR2025 |
| Santa Fe (2007-2019) | CR2032 |
| Genesis (2009-2016) | CR2032 |
Materials You’ll Need:
- New CR2032 battery
- Small screwdriver or coin
Instructions:
- Locate the key release button. It’s usually on the back of the key fob.
- Press the release button and pull the key blade out.
- Locate the battery compartment. It’s usually on the back of the key fob, opposite the key blade.
- Use a small screwdriver or coin to pry open the battery compartment.
- Remove the old battery and insert the new one. Make sure the positive (+) side of the battery is facing up.
- Close the battery compartment.
- Insert the key blade back into the key fob.
- Press the key release button to lock the key blade in place.
Troubleshooting Common Key Battery Issues:
If you’re having trouble with your Hyundai key battery, here are some common issues and how to fix them:
Battery Not Making Contact
If the battery is not making contact with the terminals, the key fob may not work properly. To fix this, try the following:
- Clean the battery terminals with a cotton swab and rubbing alcohol.
- Make sure the battery is inserted correctly, with the positive (+) side facing up.
Weak or Dead Battery
If the battery is weak or dead, the key fob may not work properly. To fix this, replace the battery with a new one.
Damaged Key Fob
If the key fob is damaged, it may not work properly. To fix this, you may need to replace the key fob.
Interference from Other Devices
If there are other devices nearby that emit strong electromagnetic fields, such as cell phones or laptops, they may interfere with the key fob’s signal. To fix this, try moving the key fob away from these devices.
Faulty Key Fob Transmitter
If the key fob’s transmitter is faulty, it may not be able to send a signal to the car. To fix this, you may need to replace the key fob.
Car Battery Not Receiving Signal
If the car’s battery is not receiving a signal from the key fob, it may not be able to unlock or start the car. To fix this, try the following:
- Check the car’s battery and make sure it is properly connected.
- Replace the key fob’s battery.
- Try resetting the key fob.
Key Fob Not Synced with Car
If the key fob is not synced with the car, it may not be able to unlock or start the car. To fix this, you may need to resync the key fob.
Other Issues
If you are still having trouble with your Hyundai key battery, there may be other issues that need to be addressed. In this case, it is best to consult with a qualified mechanic.
| Battery Type | Replacement Interval | Average Cost |
|---|---|---|
| CR2032 | 2-4 years | $5-$10 |
| CR2025 | 1-2 years | $3-$5 |
| CR1620 | 1-2 years | $2-$4 |
Warranty and Service Implications
Replacing the key battery on your Hyundai vehicle is a simple task that can be completed in a few minutes. However, it is important to be aware of the potential warranty and service implications before you attempt to replace the battery yourself.
Typically, replacing the key battery on your Hyundai vehicle will not void the warranty. However, if you damage the key or the battery during the replacement process, the warranty may be voided. Additionally, if you have any questions or concerns about replacing the key battery, it is always best to consult with a qualified Hyundai technician.
Here are some additional warranty and service implications to keep in mind:
- If you have a Hyundai vehicle that is still under warranty, it is important to have the key battery replaced by a qualified Hyundai technician. This will ensure that the warranty remains valid and that your vehicle is properly maintained.
- If you have a Hyundai vehicle that is no longer under warranty, you can replace the key battery yourself. However, it is important to follow the instructions carefully and to avoid damaging the key or the battery.
- If you have any questions or concerns about replacing the key battery on your Hyundai vehicle, please do not hesitate to contact a qualified Hyundai technician for assistance.
| Year | Model | Key Battery | Replacement Cost |
|---|---|---|---|
| 2015 | Sonata | CR2032 | $10 |
| 2016 | Elantra | CR2025 | $8 |
| 2017 | Tucson | CR2016 | $12 |
| 2018 | Santa Fe | CR2032 | $10 |
| 2019 | Kona | CR2025 | $8 |
Battery Maintenance for Optimal Performance
Preserving the longevity and effectiveness of your Hyundai key battery necessitates proper maintenance. Adhering to these simple guidelines will ensure optimal performance:
1. Replace Battery Regularly
Regularly replacing the battery, typically every 2-3 years or as recommended in your vehicle’s owner’s manual, is crucial to prevent unexpected battery failure.
2. Clean Battery Contacts
Periodically inspect and clean the battery contacts using a cotton swab dipped in rubbing alcohol to remove any corrosion or debris that may impede proper connection.
3. Avoid Extreme Temperatures
Extreme temperatures, both hot and cold, can adversely affect battery life. Avoid exposing the key to prolonged exposure to direct sunlight or leaving it in extreme heat or cold environments.
4. Test Battery Regularly
Utilize a multimeter or a simple battery tester to periodically check the battery voltage. A voltage reading below the specified level indicates the need for battery replacement.
5. Store Key Properly
When not in use, store the key in a cool, dry place to prevent the battery from draining prematurely.
6. Use Key Fob Regularly
Regular usage of the key fob helps maintain battery life by preventing the battery from becoming completely discharged.
7. Avoid Dropping Key
Dropping the key can cause damage to the internal components, including the battery, leading to premature failure.
8. Avoid Submerging Key
Submerging the key in water can cause irreparable damage to the battery and other electronic components.
9. Keep Key Away from Magnets
Strong magnets can interfere with the key’s electronic components and potentially damage the battery.
10. Don’t Leave Battery Loose
Ensuring the battery is securely fastened within the key housing prevents it from rattling around, which can cause damage.
How To Change Hyundai Key Battery
Hyundai key fobs use a small battery to power the electronics that allow you to lock and unlock your car, as well as open the trunk. Over time, this battery will need to be replaced. Here are the steps on how to change the battery in a Hyundai key fob:
1. Locate the small screw on the back of the key fob. Use a small Phillips head screwdriver to remove the screw.
2. Carefully pry open the two halves of the key fob. Be careful not to damage the buttons or electronics.
3. Locate the small battery. It will be held in place by a metal clip. Use a small flathead screwdriver to pry the clip open and remove the battery.
4. Insert the new battery into the key fob. Make sure that the positive (+) terminal of the battery is facing up.
5. Replace the metal clip and snap the two halves of the key fob back together.
6. Tighten the screw on the back of the key fob.
Your Hyundai key fob should now be working again.
People Also Ask About
How often should I change the battery in my Hyundai key fob?
The battery in a Hyundai key fob typically lasts for 2-3 years. However, this may vary depending on how often you use your key fob.
What type of battery does my Hyundai key fob use?
Hyundai key fobs typically 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 process is simple and only takes a few minutes.
