What To Do When Your Nissan Key Fob Battery Is Low

Having a low battery in your Nissan key fob can be frustrating. When the battery gets low, you may find that the buttons on the fob stop working consistently or your keyless entry system stops functioning properly. Replacing the battery yourself is usually a quick and simple fix that can get your key fob working again.

Common Signs Your Nissan Key Fob Battery Is Dying

Here are some of the most common signs that the battery in your Nissan key fob is running low and needs to be replaced:

  • Reduced range - Your key fob's range is normally 20-30 feet. If you notice the range has declined significantly, it likely means the battery is dying.
  • Intermittent operation - The buttons on your key fob may become inconsistent, sometimes working and other times not. This is a telltale sign the battery level is critically low.
  • Warning light/message - Many newer Nissan models will display a warning light or message on the dashboard when the key fob battery gets low. Heed this warning and replace the battery promptly.
  • Key fob won't start the car - If your key fob is no longer able to lock/unlock the doors or start the ignition, the battery may be completely dead. Try holding the fob right next to the start button to see if it will work.
  • Key fob must be closer to the vehicle - As the battery wears down, you'll find you need to hold the fob closer to the car for it to work properly. Over time, this distance will continue to decrease.

Paying attention to these signs of a low battery will allow you to replace it before you're completely locked out of your Nissan. Don't wait until the key fob stops working entirely.

How To Replace The Battery In Your Nissan Key Fob

Replacing the battery in a Nissan key fob is a fast, easy DIY project. Here are the basic steps:

Supplies Needed

  • New CR2032 coin cell battery (or equivalent)
  • Small Phillips head screwdriver
  • Clean cloth

Note: Some Nissan key fob models may use a different type of battery, like CR1620 or CR1616. Refer to your owner's manual for the correct replacement.

Step-By-Step Instructions

  1. Locate the small screw on the back of the key fob. It will either be under a small plastic cover that you pry open with your fingernail or along the seam in the casing.
  2. Use the Phillips head screwdriver to remove the screw.
  3. Carefully pry apart the key fob casing. Separate the two halves to expose the inner circuit board and battery.
  4. Use the cloth to wipe away any grease or dirt from the battery compartment area.
  5. Slide the old battery out of its holder and discard it.
  6. Insert the new battery with the positive "+" side facing up.
  7. Realign the two halves of the key fob casing and press them firmly together until you hear a click.
  8. Replace the screw to secure the casing. Ensure it is fully tightened.
  9. Test the key fob buttons to verify normal operation. If the fob still doesn't work, you may need to resynchronize it.

Following these instructions allows you to quickly restore your Nissan key fob's functionality. The whole process takes just a few minutes and requires no special tools.

How Long Do Nissan Key Fob Batteries Last?

On average, the battery in a Nissan key fob will last 1-2 years before needing replacement. However, a number of factors can shorten or extend battery life:

  • Frequent usage - Key fobs that are used to lock/unlock and start the car multiple times per day will run down faster.
  • Extreme temperatures - Exposure to very hot or very cold temps accelerates battery drain. Avoid leaving the fob in direct sunlight.
  • Battery quality - Higher quality lithium batteries typically last longer than cheaper alternatives. Stick with a major brand.
  • Key fob model - More advanced keyless entry systems with remote start tend to use battery power faster.
  • Vehicle model year - Older Nissans generally had less sophisticated key fobs that required less battery capacity.

Proactively replacing the battery every 1-2 years, or when you notice any signs of low power, helps ensure you won't end up stranded with a dead key fob.

Does A Nissan Key Fob Need To Be Programmed When Changing The Battery?

The good news is that you typically do not need to have your Nissan key fob reprogrammed or resynchronized after changing the battery. Since the battery provides power but doesn't store any programming, replacing it with a new battery should not affect functionality.

However, if the key fob is not working properly after you insert a new battery, a resync may be needed. Here is the process:

  • Make sure the new battery is correctly oriented and fully seated in the compartment.
  • Try holding the key fob directly next to your vehicle's start button while pressing the unlock and lock buttons.
  • If it still doesn't work, try locking and unlocking the door manually at the door itself. This can reconnect the fob.
  • For some Nissan models, there is a resync process that involves turning the ignition on-and-off in quick succession while doing certain steps with the key fob. Consult your owner's manual for details.
  • As a last resort, you may need to take your Nissan to the dealership or locksmith to have the key fob fully reprogrammed if a new battery does not restore functionality. This usually costs $50-75.

As long as your insert a proper new battery with correct polarity, in most cases the key fob will work normally without any extra steps. But if issues arise, a resync may be required to restore the connection.

What To Do If Your Nissan Key Fob Is Completely Dead

If your Nissan key fob battery has died completely, and replacing it doesn't bring the fob back to life, don't panic. You have a few options to get back in your vehicle:

  • Try holding the dead key fob directly next to your vehicle's start button while trying to start the engine. Even with no battery, the fob may still transmit just enough of a signal to work if it's close enough.
  • Use the physical backup key hidden inside the key fob to unlock the driver's door. Then you can insert the fob into the ignition slot to start the vehicle.
  • Some Nissans have an override procedure that involves entering a code on the door panel to manually unlock the car. Refer to your model's owner guide.
  • Call a friend or family member with an additional registered key fob to your vehicle - their working key can unlock the car for you.
  • As a last resort, you may need to call for roadside assistance or a locksmith to gain entry into your locked vehicle. Most can create a new working key fob or fob battery replacement on-site.
  • Once you get inside the car, immediately replace the dead battery in the key fob so you don't end up stranded again.

Don't forcefully pry open the doors or ignition - this can damage your vehicle. With the proper steps, you can get back into your Nissan safely even with a fully dead key fob battery.

FAQs

What type of battery does a Nissan key fob use?

Most Nissan key fobs use a standard CR2032 lithium coin cell battery. Some models may use CR2025 or other alternatives - check your owner's manual for the correct replacement.

Where is the battery located in a Nissan key fob?

The battery compartment is on the back side of the fob. It's covered by a small screw or plastic panel that you pry open with a fingernail to access the battery.

Do I need to program a new battery in my Nissan key fob?

In most cases, no - simply replacing the dead battery with a new one of the same type will allow the fob to work without reprogramming. Only if it fails to work after a battery change will you need to try resyncing it.

How do I resync my Nissan key fob after changing the battery?

Start by making sure the new battery is oriented correctly. Try holding the fob near the vehicle start button while pressing the buttons. Reference your owner's manual for any model-specific resync procedures involving cycling the ignition. In some cases the dealer must fully reprogram the fob.

What if my Nissan key fob is completely dead?

Try holding it near the start button anyway, or use the physical key hidden inside to unlock the door. Have another registered key fob user unlock the car for you. Or contact a locksmith or roadside assist to gain entry and get a new key fob programmed.

Changing the battery on your Nissan keyless entry remote is fast and simple in most cases. Pay attention to signs of a low battery and replace it promptly to avoid any hassles. With a new battery installed, y

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