How to Change the Battery in a Nissan Key Fob

A Nissan key fob allows you to unlock your car, start the engine, and activate various functions remotely. However, when the battery in your key fob starts to weaken, you may experience reduced range or an unresponsive fob. Fortunately, replacing the battery is a simple process that requires minimal tools and only a few minutes. In this guide, we will walk you through the steps to replace the battery in a Nissan key fob.

Signs That Your Nissan Key Fob Battery Needs Replacing

Here’s how to recognize the signs of a failing key fob battery:

• Inability to start the car: If your Nissan has a push-to-start ignition, a weak battery may prevent it from recognizing the fob.
• Unresponsive buttons: The fob stops working altogether.
• Reduced range: The key fob may only work when you are close to the vehicle.
• Delayed response: The key fob takes longer than usual to lock/unlock the car.
• Dashboard warning light: Some Nissan models display a low-key battery warning.

If you experience any of these issues, it is time to replace the key fob battery.

Tools and Materials Needed to Replace the Fob Battery

To replace your Nissan key fob battery, you will need:

• A new CR2032 battery (check your owner's manual to confirm the correct battery type)
  • Easily found at your local CVS, Walgreens or Walmart
• A small flathead screwdriver or plastic pry tool

Step-by-Step Guide to Replacing the Nissan Key Fob Battery

Don’t wait until your key fob is dead. Take a few minutes to learn how to change your key fob to be prepared.

Step 1: Identify Your Key Fob Type

Nissan has different types of key fobs depending on the model and year of the vehicle. The most common are:

• Standard key fob (rectangular shape with a physical key hidden inside)
• Smart key fob (push-to-start models with a more compact design)

Both types require the same basic steps for battery replacement.

Step 2: Remove the Mechanical Key

Most Nissan key fobs have a hidden mechanical key inside. To access it:

1. Flip the key fob to the back side.
2. Locate the small release button or latch.
3. Slide or press the release button while pulling out the mechanical key.

Set the key aside; you won’t need it for battery replacement. If you need your car now and don’t have time to replace the fob battery, you can use this mechanical key to manually start your car.

Step 3: Open the Key Fob

Once the mechanical key is removed, you can open the fob to access the battery:

1. Look for a small indentation or seam where the two halves of the key fob meet.
2. Insert a small flathead screwdriver or plastic pry tool into the seam.
3. Gently twist the tool to pop open the casing.
4. Carefully separate the two halves to reveal the internal components.

Be cautious not to apply excessive force, as the plastic casing can crack.

Step 4: Remove the Old Battery

Inside the key fob, you will find a round CR2032 battery secured in place. To remove it:

1. Use the screwdriver or your fingernail to gently lift the battery from its slot.
2. Avoid touching the new battery’s flat surfaces with your fingers, as oil and dirt can reduce its lifespan.
3. Dispose of the old battery properly in accordance with local recycling regulations.

Step 5: Insert the New Battery

Now, insert the new CR2032 battery:

1. Ensure the positive (+) side of the battery is facing up.
2. Carefully place it into the slot and press it down gently until it clicks into place.
3. Double-check that the battery is seated correctly and secured.

Step 6: Reassemble the Key Fob

After inserting the new battery:

1. Align the two halves of the key fob and press them together firmly until they snap into place.
2. Ensure there are no gaps or misalignments.
3. Reinsert the mechanical key by sliding it back into its compartment.

Step 7: Test the Key Fob

Once reassembled, test the key fob to ensure it is working correctly:

• Press the lock and unlock buttons to verify response.
• If your car has a push-to-start feature, try starting the vehicle to confirm functionality.
• Stand at different distances from the vehicle to check the range.

Still Not Working? Here are Some Troubleshooting Tips

If your Nissan key fob is not working after replacing the battery, try these troubleshooting steps:

• Reset the key fob: Some models may require reprogramming after battery replacement (refer to your owner’s manual).
• Inspect for dirt or corrosion: Clean the battery contacts with a dry cloth to remove any corrosion or dirt.
• Check battery orientation: Ensure the positive side is facing the correct way.
• Use a high-quality battery: Cheap or low-quality batteries may not work properly.
• Replace the key fob: If the fob is still unresponsive, it may be due to internal damage, and you may need a replacement.

If you’re still struggling with how to open a Nissan key fob or your key fob is still not working correctly, contact the Coulter Nissan service department or schedule a service appointment and we’ll be glad to help!