A Guide To Key Fobs

A Guide to Key Fobs

Key Fobs are a great way to control access to areas, or assets in a clean, professional looking way. It's also convenient as they fit onto lanyards or key rings!

What is a Fob?

A fob, in simple terms, a keyfob refers to a small security device carried by an individual to provide access to a particular restricted area or to control certain functions of a device remotely. Commonly, a fob is associated with electronic key systems, such as those used to unlock and start vehicles or to access buildings.

Historically, a fob referred to a small ornament attached to a pocket watch chain. It could serve a decorative purpose or be functional, holding keys or other small items.

What does Fob mean?

The term "fob" originally comes from the German word "fuppe," meaning "pocket." It entered the English language in the late 17th century. In its original usage, a fob referred to a small pocket in clothing, typically used to carry small items such as coins or watches. Over time, the term evolved to encompass the small ornaments or devices attached to watch chains, which later morphed into modern electronic key fobs.

In the context of modern technology, "fob" is often an acronym for "Frequency Operated Button" or "Frequency Operated Blocker".

How to reprogram a Key Fob?

Reprogramming a key fob is unique to each make and model. Here's a general outline of the process:

  • Consult the Owner's Manual: The first step is to consult the owner's manual for your specific key fob for specific instructions on how to reprogram the key fob. The manual will usually provide detailed steps tailored to the make and model.
  • Enter Programming Mode: Most systems have a specific sequence of actions that need to be performed to enter programming mode. This often involves inserting and removing the key from the ignition a certain number of times or pressing a combination of buttons on the vehicle.
  • Initiate Programming on the Fob: Once the system is in programming mode, you'll typically need to press a button or combination of buttons on the key fob to initiate the programming process. This may involve holding down certain buttons for a set amount of time or pressing them in a particular sequence.
  • Syncing the Fob: After initiating programming on the fob, the system will usually respond in a way that indicates it's ready to receive the signal from the fob. At this point, you may need to press a button on the fob again to sync it with the vehicle.
  • Exit Programming Mode: Once the fob is successfully programmed, you'll need to exit programming mode on the vehicle, usually by turning the ignition off or following another specific sequence of actions.
  • Test the Fob: Finally, it's essential to test the newly programmed key fob to ensure that it operates the desired functions correctly.

It's crucial to note that the exact steps for reprogramming a key fob can vary significantly depending on the manufacturer and model of the vehicle or device. Therefore, consulting the specific instructions provided in the owner's manual is essential.

How to change the battery in a Key Fob?

Changing the battery in a key fob is a relatively straigh­tforward process, typically requiring minimal tools. Here's a general guide:

  • Gather Materials: You'll need a small screwdriver (usually Phillips or flat-head, depending on the type of screws used) and a replacement battery that matches the specifications of the existing battery in the key fob. The battery type is usually indicated on the existing battery or in the owner's manual.
  • Open the Key Fob: Use the screwdriver to remove any screws holding the key fob case together. In some cases, the case may be held together with clips or snaps instead of screws. Carefully pry open the case using the screwdriver or your fingers, taking care not to damage the casing or internal components.
  • Remove the Old Battery: Once the key fob is open, locate the battery compartment. The battery is typically held in place with a small clip or spring. Use the screwdriver or your fingers to carefully release the clip or spring and remove the old battery from the compartment.
  • Insert the New Battery: Take the new battery and ensure it's oriented correctly according to the markings inside the battery compartment (usually indicated by polarity symbols such as "+" and "-"). Carefully place the new battery into the compartment, making sure it fits securely.
  • Close the Key Fob: Once the new battery is in place, carefully close the key fob case, ensuring that all clips, snaps, or screws are properly aligned. Apply gentle pressure to the case to snap it shut or reinsert any screws you removed earlier.
  • Test the Key Fob: After changing the battery, it's essential to test the key fob to ensure that it operates correctly. Press the buttons on the fob to verify that it unlocks or activates the desired functions.

If the key fob doesn't work after changing the battery, double-check that the battery is inserted correctly and that the case is closed securely. If the issue persists, it may indicate a different problem with the key fob, such as damaged internal components, in which case professional assistance may be required. You can contact us for advice!


Overall, the use of a Key Fob enhances security and offers flexibility in managing access to areas and assets. It also provides records as to who accessed what, and when. For additional info, call us on 0333 7000 123, or send the team an email at [email protected] - no commitment needed!

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