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How to Open Honda Key Fob & Replace the Battery


The Honda key fob offers convenient functions to help make your life a little easier. Unfortunately, your key fob battery won’t last forever, and eventually you’ll be faced with having to replace it. The service team at Apple Tree Honda is happy to replace your Honda key battery for you, but there may be times when you’d prefer to do the job yourself. This guide from our in-house experts walks you through how to change the battery in your Honda key fob. If you need to buy a Honda key fob battery replacement, stop by our Parts Center in Fletcher.

Choosing the Right Honda Key Fob Battery

The key fob that comes with your new Honda car, truck, or SUV uses a flat, circular 3-volt battery, which can be found at just about any hardware store in the Johnson City area. We always keep Honda key fob batteries in stock in the Parts Center at Apple Tree Honda. You can even order a Honda key battery from us online, and we’ll have it ready for you to pick up at your convenience. 

Honda Key Battery Replacement

The following steps explain how to open a Honda key fob, how to remove/replace the battery, and how to put the key fob back together.

  1. Press and slide the button that releases the metal key, and then slide the key out.
  2. Use the key or a small flathead screwdriver to gently pry the key fob open. 
  3. Press your thumb down right above the battery to hold the fob together so the contents and external buttons don’t fall out. 
  4. Remove the dead battery, taking note of the positive and negative sides in order to install the new battery correctly. Don’t touch the terminals on the new battery. The oils on your skin can cause corrosion, which shortens battery life.
  5. Insert the new battery in the same position as the old one. Use the positive (+) and negative (-) marks inside the key fob as a guide.
  6. Align the two halves of the key fob and gently apply pressure until they snap back together. 

If your Honda key fob has a screw that holds the two halves together instead of a button, use a small flathead screwdriver to remove the screw, and then follow the steps above to replace the battery.

How to Program Honda Key

Once you have learned how to change a Honda key battery, programming it is remarkably easy. The following steps demonstrate how to program a Honda key.

  1. Enter the vehicle, make sure all the doors are shut, and have your key and the fobs to be programmed ready. 
  2. Insert the key and turn to the “On” position. Then, press and hold the “LOCK” on the key fob button for one second. 
  3. Release the button and turn the key to the “Off” position. Repeat this process twice more.
  4. Turn the key to the “On” position and hold the “LOCK” button on the key fob for one second. Wait for the doors to lock and unlock automatically. Once the locks have cycled, your vehicle will be in remote programming mode.
  5. Once again hold the “LOCK” button on the key fob for one second. Once the locks cycle, the key fob will be paired with your vehicle. Repeat the process with any additional fobs that need programming. 
  6. Exit remote programming mode by turning the key to the “Off” position in the ignition.

Visit Apple Tree Honda for All Your Honda Parts & Service Needs

You can count on the parts and service professionals at Apple Tree Honda to help you with everything from how to change a Honda key battery to how to check your oil and how to change a tire. Make sure to check out our parts specials and current service coupons to take advantage of some of the best deals in the Hendersonville area. If you have any questions, please contact our Parts Center, or better yet, stop by our dealership near Asheville and let us know how we can help you today!

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