To replace a Volkswagen key battery, you need a new CR2032 or CR1632 coin-cell battery, a small flathead screwdriver, and a piece of tape. This straightforward process restores remote locking, unlocking, and ignition functions to your key fob.
What you need to replace your Volkswagen key battery
Gather a new CR2032 battery (for most Volkswagen models made after 1999) or a CR1632 battery (for older pre-1999 models). Older Volkswagen key fobs (pre-1999, resembling a simple car key) may require a CR1632 battery. You will need a small flathead screwdriver to open the key fob. You will also need a piece of tape to protect the key fob from scratches during the process.
Step 1: Remove the emergency key blade
The first step is to press the button on the key fob to release and remove the emergency key blade. Press the button on the key fob to release and pull out the emergency key blade. This is the first step before opening the fob casing.
Step 2: Open the key fob casing
To prevent scratching or damaging the key fob, wrap the tip of the flathead screwdriver with a small piece of tape. Wrap the tip of the flathead screwdriver with tape to prevent scratching the fob. Locate the seam where the two halves of the key fob meet. Gently insert the taped screwdriver into the seam and twist lightly to pry the two halves apart.
Step 3: Remove the old battery
Note the positive (+) side orientation of the old battery before removing it. Carefully remove the old CR2032 or CR1632 battery from its compartment. Handle the battery by its edges to avoid touching the terminals.
Step 4: Insert the new battery
Insert the new battery with the positive (+) side facing the correct direction, as noted from the old battery. Place the new battery into the slot with the positive (+) side facing the correct direction, as observed from the old battery. Ensure it is seated securely in the compartment.
Step 5: Close the key fob and test it
Align the two halves of the fob and press them firmly together until they snap shut. Reinsert the emergency key blade. Test all buttons to confirm the remote locking, unlocking, and ignition functions are restored.
Tips for a successful battery replacement
Always handle the new battery by its edges to avoid transferring oils that can reduce performance. If the internal contacts appear dirty, gently clean them with a soft cloth. Recycle the old battery properly at a designated drop-off location rather than throwing it in the trash.
Frequently Asked Questions
How often should I replace my Volkswagen key fob battery?
Typically every one to two years, depending on usage. Replace it as soon as you notice a weaker signal or difficulty locking or unlocking your car.
Can I use a different battery type if I don't have a CR2032?
No. Using a different battery size or chemistry can damage the key fob or cause it to malfunction. Always use the exact type specified for your model.
What should I do if my key fob still doesn't work after replacing the battery?
Double-check that the battery is inserted with the correct polarity. If it still fails, the key fob may need professional diagnosis for issues unrelated to the battery, such as a faulty circuit board or a need for phone troubleshooting and reset.
Why does my Volkswagen key fob have two different battery types listed?
Some older Volkswagen key fobs (pre-1999) use a CR1632, while most modern fobs use a CR2032. Check the existing battery or your owner's manual to confirm the correct type.
Can I replace the battery without removing the emergency key blade?
No. The emergency key blade must be removed first to access the seam and open the fob casing. Skipping this step can damage the key or fob.
