Replacing a battery in a VW key fob is a relatively simple task that can be completed in just a few minutes. However, it is important to follow the instructions carefully to avoid damaging the key fob or the battery. Replace your car key’s battery is unavoidable, particularly if you drive often. Moreover, Volkswagen key fobs use a CR2032 battery, which is a common type of battery that can be found at most hardware stores or online.
To replace the battery in a VW 4-button key fob, you will need a small flat-head screwdriver. First, insert the screwdriver into the slot on the back of the key fob and gently pry the two halves of the key fob apart. Be careful not to damage the key fob or the battery. Next, remove the old battery from the key fob and insert the new battery into the key fob. Make sure that the positive side of the battery is facing up. Finally, snap the two halves of the key fob back together. Test the key fob to make sure that it is working properly.
If replacing the battery in your VW key fob does not solve the problem, you may need to take your key fob to a Volkswagen dealer for further diagnosis.
Identifying Battery Type
As key fobs have evolved over the years, so have the batteries that power them. Modern Volkswagen key fobs typically use one of two types of batteries: CR2032 or CR2450. These coin-shaped, lithium-ion batteries are small and lightweight, making them ideal for compact devices like key fobs.
To determine the type of battery your Volkswagen key fob uses, consult your vehicle’s owner’s manual or refer to the table below:
| Vehicle Model | Battery Type |
|---|---|
| Beetle (2012-2019) | CR2032 |
| Golf (2015-2021) | CR2450 |
| Jetta (2019-present) | CR2032 |
| Tiguan (2018-present) | CR2450 |
| Touareg (2019-present) | CR2032 |
Once you’ve identified the battery type, you can purchase a replacement battery from any automotive parts store or online retailer. Make sure to choose a battery from a reputable brand to ensure its quality and longevity.
Locating the Key Fob Battery
Identifying the location of the battery in your Volkswagen key fob is the first step towards a successful replacement process. Depending on the specific model and year of your vehicle, the battery compartment may be situated in various places.
For many VW models, the battery is concealed within the central housing of the key fob. To access it, you will need to carefully pry open the casing using a small flathead screwdriver or a specialized key fob opener tool. Once the casing is open, you will be able to locate the battery, typically a CR2032 or CR2025 coin cell.
In certain Volkswagen models, the battery is housed in a separate compartment that is accessible through a release button or a small latch. Locate the compartment by inspecting the edges of your key fob for any visible openings or depressions. Once the compartment is open, remove the battery by gently pushing it out with a small pointed object, such as the tip of a pen or nail.
| Key Fob Model | Battery Location | Battery Type |
|—|—|—|
| Volkswagen Golf (2015-2021) | Central housing | CR2032 |
| Volkswagen Jetta (2019-present) | Separate compartment | CR2025 |
| Volkswagen Tiguan (2018-2022) | Central housing | CR2032 |
| Volkswagen Passat (2016-2022) | Separate compartment | CR2032 |
Selecting the Correct Replacement Battery
Ensuring you have the right battery is paramount for a successful replacement. Utilize your vehicle’s key fob manual to pinpoint the precise battery type it requires. This information is often indicated as a battery model number or code, such as CR2025 or CR2032.
If you lack access to the manual, you can also rely on the original battery itself. Examine the small imprint on its surface to decipher the battery type. Double-checking the battery specifications is crucial to avert any mismatches and ensure seamless operation of your key fob.
Battery Equivalents and Compatibility
In certain instances, the exact battery type you require may not be readily available. However, you can substitute it with a compatible equivalent. The table below lists several common battery types and their respective equivalents:
| Original Battery | Compatible Equivalents |
|---|---|
| CR2025 | 2025, DL2025, BR2025, ECR2025 |
| CR2032 | 2032, DL2032, BR2032, ECR2032 |
| CR1616 | 1616, BR1616, ECR1616 |
Using a compatible battery will not compromise the functionality of your key fob. Just ensure the voltage and dimensions align with the original battery.
Extracting the Old Battery
4. Removing the Physical Battery:
Once you’ve opened the fob, you’ll now have access to the battery. Carefully inspect the battery and take note of its orientation. Use a small, flat-head screwdriver or a plastic pry tool to gently prise out the battery from its housing. Avoid using sharp objects or excessive force, as you could damage the fob or its internal components.
As you remove the battery, pay close attention to its position. Remember how it was oriented, as you’ll need to insert the new battery in the same way. Also, be cautious of any small springs or clips that may be attached to the battery. These components may be essential for the fob’s operation, so handle them with care.
| Battery Types: | Typical Appearance: |
|---|---|
| CR2032 | Flat, round, silver-colored |
| CR1632 | Flat, round, gold-colored |
| CR2450 | Flat, round, larger than CR2032 |
Secure the old battery in a safe place and dispose of it properly according to local battery disposal guidelines.
Inserting the New Battery
Step 1: Locate the Battery Compartment
The battery compartment is typically found on the back of the key fob. It may be secured with a small screw or a latch.
Step 2: Open the Battery Compartment
Use a small screwdriver or a coin to carefully pry open the battery compartment. Be gentle, as excessive force can damage the fob.
Step 3: Remove the Old Battery
Use your fingernail or a pair of tweezers to gently lift out the old battery. Note the orientation of the battery, as it will need to be inserted in the same way.
Step 4: Clean the Battery Contacts
Before inserting the new battery, use a cotton swab or a soft cloth dampened with rubbing alcohol to clean the battery contacts in the compartment. This will ensure a good connection.
Step 5: Insert the New Battery
Align the new battery with the terminals in the compartment. Make sure the positive (+) side of the battery faces the terminal marked with a plus sign (+). Press gently on the battery until it snaps into place.
| Battery Type | Commonly Used in VW Key Fobs |
|---|---|
| CR2032 | Yes |
| CR2025 | Yes |
| CR1616 | Yes |
Replacing the Key Fob Casing
If your key fob casing is damaged or worn, you can easily replace it with a new one. Here are the steps on how to do it:
- Gather your tools. You will need a small screwdriver, a new key fob casing, and a small pair of pliers.
- Remove the key blade. Use the screwdriver to remove the screw that holds the key blade in place. Once the screw is removed, you can pull the key blade out of the casing.
- Open the key fob casing. There are two small tabs on the back of the key fob casing. Use the screwdriver to gently pry these tabs open. Once the tabs are open, you can pull the two halves of the casing apart.
- Remove the electronic components. The electronic components are held in place by two small screws. Use the screwdriver to remove these screws, and then carefully lift the electronic components out of the casing.
- Place the electronic components in the new casing. Line up the electronic components with the corresponding slots in the new casing. Carefully press them into place.
- Close the key fob casing. Fit the two halves of the casing together and press them firmly until they snap into place.
- Reattach the key blade. Insert the key blade into the slot in the casing and secure it with the screw.
- Test the key fob. Press the buttons on the key fob to make sure that they are working properly.
Battery Replacement
Step 1: Gather Materials
Before you start, you’ll need a replacement battery for your key fob. CR2032 batteries are typically used in VW key fobs.
Step 2: Locate the Battery Compartment
The battery compartment is usually located on the back or bottom of the key fob. It may be covered by a small door or screw.
Step 3: Open the Compartment
Using a small screwdriver or coin, carefully pry open the battery compartment. Be careful not to damage the compartment or key fob.
Step 4: Remove the Old Battery
Use your fingers or a small tool to remove the old battery from the compartment. Note the orientation of the battery so you can insert the new one correctly.
Step 5: Insert the New Battery
Insert the new battery into the compartment with the positive (+) side facing up. Ensure it fits snugly into place.
Step 6: Close the Compartment
Gently close the battery compartment door or tighten the screw. Make sure it is securely closed to prevent the battery from falling out.
Programming the New Battery (If Needed)
In some cases, you may need to program the new battery to the key fob. This is necessary if the key fob is not working after replacing the battery.
Step 7: Check the Key Fob
Insert the new battery and press the key buttons. If the key fob is functioning properly, you do not need to program it.
Step 8: Programming Instructions
If programming is necessary, refer to your VW manual or online resources for specific programming instructions for your model and year of vehicle. Generally, it involves a sequence of button presses or holding certain buttons while inserting the key in the ignition.
Replacing the Battery in a VW Key Fob
Materials You’ll Need:
- New CR2032 battery
- Small flathead screwdriver or key
- Soft cloth or towel
Steps:
-
Locate the Key Release Button: Usually found on the back or side of the key fob.
-
Press the Key Release Button: Depress the button to release the key blade or keyless entry fob.
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Pry Open the Fob: Gently insert the screwdriver or key into the seam between the front and back panels of the fob.
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Separate the Panels: Carefully spread the panels apart, exposing the battery.
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Remove the Old Battery: Use the tip of the screwdriver or a cloth to lift out the old battery.
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Insert the New Battery: Place the new CR2032 battery into the slot, with the positive side facing up.
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Snap the Panels Back Together: Align the panels and press them firmly together until they snap into place.
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Test the Fob: Press the buttons on the fob to ensure it’s working properly.
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Troubleshooting Common Issues:
- Fob not working after battery replacement: Check the battery terminals for corrosion or debris. Clean them with a cotton swab and rubbing alcohol.
- Button malfunction: Ensure the buttons are not stuck or obstructed. Clean the buttons with a soft cloth or cotton swab.
- Intermittent signals: The battery may be low or weak. Replace the battery even if it appears to have some charge left.
- Key fob range reduced: The antenna may be damaged or obstructed. Clean the antenna area on the fob and ensure there are no obstacles between the fob and the vehicle.
- Fob not recognized by the vehicle: This may indicate a problem with the receiver in the vehicle. Consult an automotive professional for assistance.
- Keyless entry not functioning: Check if the receiver in the door handle or trunk is clear of debris or corrosion. Clean the receiver with a soft cloth.
- Fob not programming correctly: Follow the programming instructions carefully and ensure the vehicle is in programming mode.
- Battery draining quickly: There may be a parasitic draw in the vehicle, causing the battery to drain prematurely. Consult an automotive professional to identify the source of the draw.
- Fob case damaged: The fob case may have become cracked or weakened over time. Replace the damaged case to protect the internal components.
Changing the Battery in a VW Key Fob
Replacing the battery in a VW key fob is a simple and straightforward process that can be done in just a few minutes. Here’s a step-by-step guide to help you get it done:
- Gather your materials: You’ll need a new CR2032 battery and a small Phillips head screwdriver.
- Open the key fob: Use the screwdriver to unscrew the two screws that hold the key fob together.
- Remove the old battery: Gently pry out the old battery using a small flathead screwdriver or your fingernail.
- Insert the new battery: Place the new battery in the same orientation as the old one.
- Close the key fob: Align the two halves of the key fob and screw them back together.
- Test the key fob: Press a button on the key fob to make sure it’s working properly.
Maintenance Tips for Key Fob Batteries
To keep your key fob battery lasting as long as possible, follow these tips:
- Store your key fob in a dry place: Moisture can damage the battery and shorten its lifespan.
- Avoid extreme temperatures: Keep your key fob away from heat and cold, as both can damage the battery.
- Only use the key fob when necessary: The more you use the key fob, the faster the battery will drain.
- Don’t keep the key fob in your pocket with metal objects: Metal objects can interfere with the key fob’s signal and cause the battery to drain more quickly.
- Replace the battery as soon as possible: When the key fob battery is low, it can cause the key fob to malfunction or stop working altogether.
- Use a high-quality battery: A good quality battery will last longer than a cheap one.
- Don’t try to repair a damaged key fob: If your key fob is damaged, it’s best to replace it. Trying to repair it yourself could damage the key fob or make it more difficult to get it repaired properly.
- Keep your key fob clean: Dirt and grime can build up on the key fob and interfere with its signal. Clean it regularly with a soft cloth.
- Don’t overtighten the screws: When you’re replacing the battery, don’t overtighten the screws. This could damage the key fob.
- Replace the battery every 2-3 years: Even with proper maintenance, key fob batteries will eventually need to be replaced. It’s a good idea to replace the battery every 2-3 years to ensure that your key fob is always working properly.
How to Replace Battery in VW Key Fob
Replacing the battery in a VW key fob is a simple task that you can do yourself. Here are the steps on how to do it:
- Locate the battery compartment. It is usually located on the back or bottom of the key fob.
- Use a small screwdriver or your fingernail to open the battery compartment.
- Remove the old battery and insert the new battery. Make sure that the positive (+) and negative (-) terminals of the battery are facing the correct way.
- Close the battery compartment and test the key fob to make sure it is working properly.
People Also Ask About How to Replace Battery in VW Key Fob
How do I open the key fob?
Locate the small indent on the back of the key fob. Insert a small screwdriver or your fingernail into the indent and pry the key fob open.
What type of battery does my VW key fob use?
Most VW key fobs use a CR2032 battery.
How often should I replace the battery in my VW key fob?
The battery in your VW key fob should be replaced every 2-3 years.
Can I replace the battery in my VW key fob myself?
Yes, you can replace the battery in your VW key fob yourself. Follow the steps outlined in the article above.
