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Key fobs have come a long way from their beginnings as decorative trinkets. They now have the ability to do everything, from locking and unlocking the doors to remote start of the car. Some even have extra features that the owners may not be aware of.

If your car's key fob begins acting up, it's probably time to replace the battery. The good news is that the process is pretty simple.

Switchblade Keyless Entry Fobs

A key fob can be used to do more than unlock the car and start it. It is also a theft deterrent and security device. Modern day fobs are easy to use and durable, and are more secure than ever. The high cost of these devices can make it expensive to replace them if you lose or break one.

A basic key fob might only cost a few dollars to purchase however programming it will cost you more than $200. These costs are higher for luxury vehicles or those that have special features. Certain basic warranties or insurance coverage programs might pay for an replacement fob, but the majority of people will have to shell out hundreds out of pocket when they need to have their fob repaired.

Certain cars of recent years also come with a fob, which can also function as a smart key. These fobs can lock, unlock, and activate an alarm with the press of a button. They can also summon your car similar to Tesla's summon feature however, they must be within the proximity to the vehicle in order to operate.

The type of fob that you have is an aluminum lock that folds in the fob, [Redirect-302] like a switchblade. The key is tucked away when not being used by a spring. It is removed by pressing a button. A switchblade fob generally costs around the same price as a standard key fob which comes with an iron key.

Keyless Entry Fobs that have Physical Key Hidden

Modern key fobs provide more than the ability to unlock and start a vehicle. Newer models can do everything from lowering windows to summoning the car and even auto-parking. Some of these functions aren't necessary for your daily commute, but they could be extremely useful in certain scenarios.

Some key fobs have keys that are hidden in them, usually in the form of a flat metal key blade. The keys can be put in a small storage compartment inside the key fob or removed by pressing the button on the base. A spare key can be useful when you are in a rush to get to your BMW and you have forgotten your key.

The battery in your key fob is bound to die at some point. This can be a huge neck pain. Fortunately that replacing the battery of your key fob is easy and cost-effective. You can purchase a new battery from your dealer, a seller from a third party like BimmerTech, or a hardware shop or big-box retailer.

Certain BMW key fobs come with the Display Key that allows you to control your car from the key. You can check if your doors are locked, and also schedule when the air conditioner will be on. You can even check the level of fuel up to 1,000 feet away.

Keyless Entry Fobs with Folding Side Mirrors

Key fobs of today are loaded with more advanced electronics than ever before, and this tiny plastic device can do a lot more than simply lock or unlock the doors and also start the car remotely. It can also make chirping noises to help you locate your car in the parking lot or serve as a remote audio control that can control the radio stations of your car.

Some of the latest models come with a hidden feature that allows you to lower the windows immediately with the click of a switch. This is a great feature to have in the summer heat when the air conditioner doesn't quite get the job done. It's possible to test several different combinations before you discover the one that is effective in your car.

If you're one of those who likes tight spaces keys on some newer Chevrolet and GMC vehicles can help out by automatically folding the vehicle's side mirrors after locking the vehicle. Simply press the "lock" button on the fob for a full second to enable this feature.

Do you have a vehicle with someone who is a gentle giant or just doesn't seem to have the same length legs as you do? It might be a good idea to search for a car that has an ignition keyfob that lets the setting of a memory seat. Certain models, like GMC, GMC permit you to set your preferred seat, and [Redirect-302] the car will remember it each time you start it.

Keyless Entry Fobs, that can be connected to Bluetooth

With the popularity of smart keys and smartphone access to cars criminals have had an easy way to steal vehicles. Wireless protocols that these systems use are susceptible to hijacking by criminals who can spoof the signal of the key fob or smartphone to unlock and start your car.

A key fob, small, programmable hardware token can be used to provide one-factor authentication on the device to facilitate access to physical objects like the vehicle, computer system and restricted areas or mobile device. The fob transmits wireless signals to a sensing device, which detects the information and commands and performs predetermined functions, such as locking or unlocking.

In many instances, a key fob is also an security token that can support two-factor or multi-factor authentication (2FA or MFA) methods to offer additional security. This is usually accomplished by adding biometric verification to the equation. For example fingerprint, iris or voice print can be used.

Keyless proximity lock systems such as the Kwikset Kevo allow users to open their doors using smartphones or a Bluetooth-enabled key fob, removing the need for a traditional key. These systems are popular among business owners due to the fact that they allow administrators to manage user access and onboard new employees without having to change locks or distribute keys cards.