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vehicle smart key; from the Menwiki blog, Technology

Vehicle smart key technology allows a driver to unlock and start the car simply by pressing the door handle or putting the key in the pocket. It also allows for a variety of other adjustments, including the position of seats, internal temperature settings, stereo presets, and mirror positioning.

This could also raise security issues.

Security

Smart keys are key fobs that are computerized that communicate with the vehicle through an embedded antenna to unlock doors and start the motor. Smart keys, unlike traditional keys that emit the same frequency each time they're used, transmit encrypted signals that are only compatible with the car to which they belong. This makes it much more difficult for thieves with the latest technology to steal or spoof the signal and use the key to steal your car.

Mercedes' Keyless Go system, for example, has an internal transponder, which can identify the driver's key. When the Smart Key comes within 1.5 meters of a car it automatically unlocks the tailgate and door and starts the engine when the key's button is hit.

Certain smart keys, such as those made by BMW and Mercedes-Benz, also come with user-specific settings. These allow the driver to adjust the mirrors, seat, steering wheel position, and audio preferences with the touch of a single button. They also have a backup lock that prevents the vehicle from starting if it is not connected to the key.

This technology assists drivers from locking their cars, especially when they have to search their purse or backpack to locate keys in a parking lot packed with people or on an area with high crime rates. A lot of systems will also notify drivers when their keys are running low on battery, but this feature is different for each manufacturer.

Convenience

The smart key is perfect for those in a rush to get somewhere. You can lock, unlock and start your car by pressing a button on the door handle or the trunk release. Popular Mechanics explains that the key fob can also be used for tracking charging location, charging status, and other information about your vehicle.

One of the biggest advantages is that you aren't able to accidentally get locked out. The key fob communicates with an antenna within the vehicle to determine if it's within range. If it's not, the engine won't start. This helps deter would-be thieves who may steal your vehicle in order to sell the parts.

BMW reports that the smart forfour key programming key uses rolling codes to stop cloning and hacking. A computer within the vehicle recognizes the code and confirms it before starting the engine. Most systems have a mechanical back-up in the form a hidden key blade.

Modern smart roadster key programming keys also recognize the key that is being used and adjust the vehicle settings in accordance with the key's use, according to How Stuff Works Electronics. If you turn on the vehicle while holding the key in your palm for instance the windows as well as the sunroof will open to allow air circulation to the interior. You can also set the speed limit to only be applied when the vehicle is started using the selected key, which could be useful when loaning your vehicle to a novice driver.

Battery Life

If you're looking for a way to get more mileage out of your vehicle's smart car key coding key, or just want to make sure it won't die during a trip to the grocery store, you can activate an auto manufacturer-specific feature called Power Saving Mode. To activate this feature, hold the lock button, then press the unlock button.

This will prevent your smart key fob from having to transmit or receive radio waves. This will greatly extend the battery's life. You can always restart the function by pressing the lock and unlock buttons again.

Certain smart keys have anti-theft capabilities that protect them from being copied by thieves. Mercedes-Benz smart keys utilize rolling codes to stop unauthorized access. When the smart key is inserted into ignition, a computer within the car validates the code in milliseconds prior it starts the engine. BMW uses a Display Key with a small LCD color screen. This lets drivers lock their vehicles, unlock them, and then start them without having to remove the smart key from their pocket.

Call Pop-A-Lock if you need to replace the battery on your smart key fob, or should you be thinking of buying a car with a smart-key. Our mobile locksmiths can change the battery on any smart key and assist you set it so that your car can recognize it.

Special Cases

Although smart keys aren't security-wise, they can be used to deter thieves. smart forfour key keys are designed to stop hackers from hacking into the system. When placed in the ignition of the car the computer checks the code in milliseconds. Mercedes-Benz developed this technology, which is currently utilized by luxury car brands.

A smart key system will continue to work even if you forget the key in your trunk or leave it in a restaurant. Certain systems will also notify the driver if the battery is depleted. Some brands offer key covers that are specifically designed for smart car key repair keys to protect the fob from damage.