How to Change the Battery in a Ford Key Fob?

You probably use a remote-control transmitter or key fob every day if you have a car. Key fobs have replaced traditional car keys, whether to lock, unlock, or even start your vehicle. Ford has been using key fobs on their vehicles for almost three decades, and the batteries on the fobs last for quite some time. However, if you find that your Ford vehicle’s key fob is acting up, you might want to try putting in a new battery before getting a new fob. This article provides a step-by-step guide on how to change the battery in a Ford key fob.

Signs That Your Ford Key Fob Needs a New Battery

Your key fob will start behaving erratically if the battery is dying. Here are the signs you need to watch out for.

Signs That Your Ford Key Fob Needs a New Battery

Decreasing Signal Strength

If you need to get closer and closer to your car for the key fob to work, there is likely a problem with your battery. A dying battery will cause a decrease in signal strength, and the range needed for the fob to work will decrease.


A dying key fob battery will also be inconsistent. It will sometimes work and sometimes not. This is potentially dangerous, and you will have to continuously check that your vehicle is locked when you walk away.

Multiple Presses

If you have hit the lock, unlock, or release button multiple times for it to work, this could also indicate a dying car fob battery. You also want to avoid pressing the button too hard as you can damage the button in the long run.

Car Warning

In the newer Ford models, the key fob allows keyless cars and trucks to start. People often keep the key fobs in their pockets or bags when they jump in the car. However, a dying battery may result in a weaker signal, and the car may not recognize the fob. In these cases, Ford vehicles may warn you via the car computer system. You should not delay replacing your key fob’s batteries in this case, as you risk not being able to start your car.

On the positive side, if you are ever in a situation where you do not have the time to replace your key fob battery but need to use your car, you can always use the spare or emergency key. This option will buy you some time before you can replace the batteries of your original ford key fob.

Ford Key Fobs

If you own a Ford vehicle, you probably have a key fob. These fobs have been in use since 1993, so there is quite some variation between them. Some include a metal key, while others offer keyless entry and have a chip that enables this. However, no matter which type of fob you have, it will be a battery-operated device and will require a change in the battery at some point.

The process may vary slightly depending on which type of fob you have, but we will go through it in the next section. Before you begin, ensure that you have the correct tools and the right battery to replace the previous battery. Since 1993, there have been seven Ford key fobs and three possible battery sizes. Most Ford vehicles use CR 3V batteries which resemble a small coin; you just need to confirm the size. You can check the battery size in your owner’s manual or by doing a simple internet search.

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How to Replace a Ford Key Fob Battery?

How to Replace a Ford Key Fob Battery

For Ford Key Fobs With External Key

Pre-2015 Ford key fobs either have an external or flip key. To replace the battery, follow these instructions:

  1. If there is a release button on the back cover, press it to release the cover. If there is no release button, continue to the next step.
  2. Using a flat head screwdriver as a pry bar, separate the back cover from the front.
  3. This should reveal the battery inside. Use the flat screwdriver to help you pry the battery out and take note of the positioning of the positive side.
  4. Insert a new battery, ensuring that you put it in the same way.

Ford Keyless Fobs

Newer models have keyless fobs that have a hidden emergency key. To change the battery in one of these key fobs, follow these instructions:

  1. Remove the key blade or valet key from the top of the key fob.
  2. Press the button on the back cover and use a flat screwdriver to pry open the back cover.
  3. Inside you will find the emergency key positioned on top of another piece of black plastic. Using the flat screwdriver, carefully pry open this plastic cover.
  4. These key fobs usually have two batteries separated by a white piece of paper telling you the correct positioning of the batteries. Replace the batteries and the white piece of paper in the same position.

After you have followed these steps and replaced your back cover, it is time to test your key fob. This battery replacement should eliminate any issues you were experiencing. However, if it does not, you may have to take your Ford vehicle’s key fob to your local dealer.


No one wants a faulty key fob. Luckily, changing the batteries on a Ford key fob is simple. You just have to check your user manual to ensure that you purchase the correct batteries. It’s an easy fix, and you do not need a technician to do the job!

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