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Key fobs aren't just decorative trinkets. They can now perform everything from locking and unlocking doors to start cars remotely. Some of them have secret features that owners might not be aware of.

If your car's key fob begins acting up, it's probably time to replace the battery. It's a simple task.

Switchblade Keyless Entry Fobs

A key fob is a lot more than unlock and start an automobile. It also serves as a theft deterrent and security device. Modern key fobs are more powerful, convenient and secure than they have ever been. The high cost of these devices can be costly to replace them in the event that you break or lose one.

A basic keyfob can cost a few dollars however it could cost upwards of $200 to program. Those costs are even higher for vehicles that are of high-end or with specific features. A few basic warranties or insurance coverage programs might cover the cost of an replacement fob, but most people find themselves shelling out hundreds out of pocket if they need to get their fob fixed.

Some newer vehicles also come with keys that can be used as an intelligent key. These fobs are capable of locking, unlocking, or activating an alarm with the press of a button. They can also summon your car, like Tesla's summon function. However, they must be within the range of the vehicle to function.

The fobs that are of this type include an iron key that folds into the fob like a switchblade knife. The key is tucked away when not being used by a spring. It is removed with the push of the button. A switchblade fob generally costs roughly the same amount as an ordinary key fob, which has an iron key.

Keyless Entry Fobs that have a physical key hidden

Modern key fobs provide more than the ability to unlock and start a vehicle. The latest models can perform everything from opening and closing windows, summoning the vehicle and even auto-parking. While some of these cool features may not be helpful for your daily commute but they can be helpful in certain situations.

Some key fobs have the physical key, which is usually in the form a flat blade of metal. The keys are stored inside a small compartment within the fob. They can be removed by pressing a button at the base of the key fob. If you're in a rush to get to your vehicle and you've forgotten your keys or you wish to be in a position to start your BMW with push-to-start functionality, having an extra key can come in handy.

The battery inside the key fob is most likely to die at the time, and that can be a huge pain in the neck. Fortunately that replacing the battery in your key fob can be easy and cost-effective. You can buy a replacement from your dealer, a third-party retailer like BimmerTech or a hardware shop or big-box retailer.

Some BMW key fobs include a Display Key which adds to the range of functions that can be driven using the key. You can determine if the doors are locked and set a timer when the air conditioner should start. You can even see the fuel level up to 1,000 feet away.

Keyless Entry Fobs with Folding Side Mirrors

The key fobs of today are more sophisticated than ever. They do more than lock and unlock the doors or start the car remotely. It can also emit chirping sounds to assist you in finding your car in a lot or as an audio remote control to control the radio stations of your car.

One of the most useful hidden functions is available on modern models that allow users to shut down all windows immediately by pressing the button on your key fob. This is ideal on a hot summer day when the AC doesn't do the job. It's possible to test several different combinations before you can find the one that will work in your car.

If you prefer to keep your car in a compact space, the fobs that are found on modern Chevrolet or GMC vehicles will automatically fold the side mirrors after you lock it. Simply press the "lock" button on the fob for a full two seconds to enable this feature.

Do you share your car with an amiable giant or someone who isn't the same length of legs as you? Perhaps you should think about a car that has keys that allow you to set a seat memory. Certain models, such as the ones from GMC let you set up an individual seat preference and then automatically remember it each time you turn on the car.

Keyless Entry Fobs that connect to Bluetooth

With the growing popularity of smart keys and smartphones for car access, criminals have been given an easy way to steal vehicles. These systems rely on wireless protocols that are prone to stealing. Criminals are able to spoof signals from your phone or key fob to unlock the car and then start it.

Key fobs are small, programmable hardware token that provides on-device, one-factor authentication to enable access to physical objects like a car computer system, restricted area or room or mobile device. The fob transmits wireless signals to the sensor, which can recognize and execute predetermined commands.


In many cases, a key fob is also a security token that supports multi-factor or two-factor authentication (2FA or MFA) methods to provide additional security. This is usually accomplished by adding biometric verification to the equation. For instance fingerprints, iris or voice print can be used.

Kwikset Kevo proximity keyless locks permit users to open their doors with a smartphone or Bluetooth-enabled fob. This eliminates the need for traditional keys. These types of systems are popular with business owners as they make it fairly easy for administrators to welcome new employees and manage access for their users without the need to alter the locks or distribute key cards.

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