KEY FOB: Meaning, Types & All You Should Know

Key Fob
Image Credit: TowingLess

A key fob controls who can get into data, network services, mobile devices, and computer systems. It is the most important and modern addition to your keychain. Key fobs are very helpful for car owners because they can quickly lock and unlock a car and are small enough to fit in the palm of your hand. This post will cover all you need to know about a Key FOB.

What is Key FOB

A small, programmable device called a key fob allows you to enter a physical space. To simplify access to a system or device, such as a car, computer system, restricted area or room, mobile device, network service, or other kinds of keyless entry system, a key fob, also known as a hardware token, provides a one-factor authentication on-device.

Unlike manual locks, a key fob can access a lock without a physical key. The key fob allows for remote access and is safer and more practical.

Programming a Key FOB

Electronic keys are convenient and prevent thieves from entering your automobile. Thankfully, many of these keys and key fobs are programmable and changeable at home. Use functional keys to start and stop the ignition while programming a car key. Use the unprogrammed key or touch a key fob button after that. Your key should work perfectly, but a good auto dealer or locksmith can help you if it doesn’t.

#1. The driver needs to sit down.

  • You need access to the ignition switch to link the keys to the car’s electronics.
  •  You might need two working keys to make or fix the third one.
  • Consult your owner’s manual for any additional instructions provided by the manufacturer.
  • You can also research your car’s brand and model online.
  • It is possible to program keys for your car using the precise techniques needed.
  • Many newer vehicles use electronic keys with modern transponders.
  •  These must be programmed to function with your car’s anti-theft system by a dealer or auto locksmith.

#2. A programmable key should be placed in the Ignition

  • After inserting the key, take a little break.
  • Place the other two keys somewhere that is easy to get to.
  • You need to move swiftly to activate the car’s programming mode.
  • Do your best to become comfortable with each key.

#3. Activate and deactivate the car.

  • The ignition key should now be turned on.
  • Avoid starting the car.
  • To turn on the electricity, simply turn the key to the “on” position.
  • Immediately reverse the key to turning the ignition off.

#4. For the vehicle’s start and stop, use the second functional key.

  • You have around five seconds to remove the first key.
  • Find the second programmed key, then use it to crank the ignition.
  • Turn the key once more to start the vehicle’s lights but not its engine.
  • Turn the key backward to turn the automobile off.

#5. Enter the third key and turn it.

  • You’ll have around 10 seconds to change the second key with the unprogrammed key.
  • Switch the key fast back to the on position.
  • After a little interval, switch it back to off. Keep the key in the ignition at all times.

#6. Wait until the security light illuminates.

  • Check your dashboard for the security light for your car.
  • It should stay light for about three seconds.
  • You might need to push the buttons on the key you want to program.
  • Once you’re finished, take out the key and test it out.

Setting Up a Key FOB

  • Lock every door while sitting in the driver’s seat and holding the ignition key and key fob (also known as a keyless entry remote).
  • Set the ignition to “on” and turn the key.
  • Stop starting the vehicle.
  • Check the owner’s manual for your car or the internet for comprehensive instructions.
  • The steps required to complete reprogramming differed slightly between manufacturers.
  • Press the lock button on your remote control.
  • If you know the transmission receiver’s location, aim for the remote.
  •  Aim it in the direction of the front of the vehicle, maybe above the mirror. After rotating the key for a few seconds, push the lock button.

 Turn the Ignition Off

  • Remove the key from the ignition as soon as possible.
  • Switch off the car. Continue to move quickly.
  • There are few seconds left until the car’s system resets the instructions.

Continue programming with more remote controls.

  • Many cars desync all the current remotes when you try to program a new one.
  • Starting at the beginning, turn the ignition on and off before pressing the lock button on the subsequent remote.
  • Move swiftly when performing tasks.
  • Each key after the final one needs to be reprogrammed.
  • If you wait an extended period, the car will quit programming mode.
  • You’ll need to start afresh to program all the remote controls.
  •  You might need to repeat the process several times on some vehicles to reach programming mode. You might hear the locks click if this worked.

Begin the vehicle’s engine.

  • Restart the ignition by turning the key.
  • To turn on the electrical system, start the engine. 
  • Try not to start the car.
  • Press the lock button on the first remote.
  • When you press the button, the car should enter programming mode if it hasn’t already.
  • The locks on car will lock to show what happened.
  •  Lock any remote controllers you may have.
  • Start with the first button and press it again to confirm that the remote is programmed.
  • The locks should sound to indicate that the remote has been successfully programmed. Quickly change to the next remote.
  • Repeat the process for each remote control you want to program.
  • When everything is finished, try your remote controls and turn the ignition off.

Switching Keys

  • Get a fresh key
  • Blank keys are available for purchase online at a discount.
  •  Make sure to buy ones made exclusively for the make and type of your automobile.
  • The keys also have to be vacant. You cannot, for example, take the remote control from your old car and program it into your new one, even if they are the same make and model.
  • You most likely won’t be able to program a new key on your own for modern automobiles.
  • You must visit a store or a locksmith. Call a locksmith or a dealer. Each and every electronic key contains a transponder chip. Some of these only let you open the car, not turn it on. You must speak with an auto locksmith or a dealer approved by the maker of your vehicle. Either of them will be able to help you if you are unable to program your key.
  • To ensure that you receive the appropriate key, your automobile’s vehicle identification number (VIN) will be utilized.
  • Your car’s vehicle identification number (VIN) will be used to ensure you get the right key through the windshield at the right side of the dashboard.

Types of Key FOB

#1. Master Car Key

As the name implies, a master car key can open doors and start the ignition of multiple vehicles. Due to the wide range of duties that master automobile keys can perform, some restrictions govern their use. A person might get into a lot of trouble if they are discovered using a master car key without authorization.

#2. Flip-Style Car Keys

Nowadays, several automakers utilize flip-style car keys, popularly known as “switchblade” car keys. The term implies that the

The actual key is designed to fold within the key fob when not used.

Because they are so little, flip keys are frequently used. Because switchblade keys are so tiny, some people even adapt other kinds of car keys to fold into them. Many companies can change your regular car key to a flip-style one.

#3. Machine-Cut Car Key

These include mechanically cut automobile keys. They belong to the most common categories of automotive keys. This is the most basic car key still in use today; it is also known as a vintage car key. Typically, older vehicles without security encoding utilize these keys.

However, these keys are not the most secure because they are the most basic type. These keys are frequently made primarily of metal. This shows that the key can be duplicated using a variety of methods. Regular blank keys can be used to duplicate mechanically cut car keys.

#4. Laser-Cut Car Key 

In the 1990s, luxury car makers began using laser-cut keys to make cars less likely to be stolen. Vehicle keys that have been laser-cut often have a broader profile than regular car keys. A laser-cut vehicle key has the same laser groove on both sides. This makes it feasible to start the car from any angle and makes it more difficult to produce a second key.

Key FOB Batteries

#1. Duracell 3V 2032 Lithium Battery – 2 Pack, Key Fob Batteries LITHCR2032-2, $9.99

With Duracell’s Duralock Technology, these batteries last longer than comparable batteries. Don’t forget to ask about our lifetime battery replacement services for your watch or keychain; the prolonged operational life of these batteries makes them ideal for many small and flat devices. Duracell Coppertop lithium batteries have a compact design that’s ideal for many of these devices.

#2. Nuon 3V 2032 Lithium Coin Cell Battery – 2 Pack SMCCR2032-2 $9.49

  • The watch or key fob should be powered by a Nuon lithium battery as a replacement.
  • This 3V coin cell Nuon lithium battery can be used for a variety of small electronics, including watches, calculators, e-readers, glucose monitors, toys, games, keychains, TV remotes, and medical equipment.
  • It is built to last for a very long time, so it won’t need to be changed for a very long time.
  • In-store installation services are available for watch and key fob batteries. Don’t forget to ask about our lifetime replacement services for your watch or key fob!
  • This SMCCR2032-6 Nuon 3V 2032 Lithium Coin Cell Battery is perfect for small electronics like watches, calculators, eBooks, glucose monitors, toys, games, key fobs, TV remotes, and medical equipment. The ideal battery replacement for your watch or key fob is the Nuon lithium battery.
  • Duracell Procell coin cell batteries are designed for use in compact, professional gadgets like key fobs, glucometers, security sensors, and other cutting-edge sensors and monitors.

#3. The LITHPC2032 Duracell ProCell 3V 2032 Lithium Coin Cell Battery – 20 Pack costs $105.00

Since lithium batteries last much longer than alkaline batteries, they are made for small, professional devices like security sensors, key fobs, glucometers, and other cutting-edge tools for sensing and monitoring. Ask about our services to replace watch and key fob batteries for life when you visit us to recycle. Bring your old, dead batteries to a Batteries Plus store nearby for proper disposal. There can be fees.


You need to be physically close to the car to use keyless entry. You might be able to join remotely if you’re far away. In contrast to remote keyless entry systems, which may not come with an extra set of traditional keys, keyless entry systems are typically always packaged with an extra set of traditional keys.


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