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Vehicle Smart Key Technology

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

However, it could also create security concerns.

Security

Smart keys are electronic keys that communicate with a vehicle via one of the car's embedded antennas to open the doors and to start the engine. Smart key fobs, unlike traditional keys, which emit the same frequency every time they're pressed, transmit encrypted signals which are only compatible with the vehicle to which they belong. This makes it more difficult for hackers with the latest technology to intercept or fake the signal and use your key to steal your vehicle.

For example, Mercedes' system -known as Keyless Go -- has an internal transponder that identifies the driver's keys. When the Smart Key comes within 1.5 meters of a vehicle it instantly unlocks the door and tailgate, and the engine starts when a button on the key is activated.

Certain smart keys, such as those from BMW, also have user-specific settings that allow the driver to adjust the mirrors, seat and the steering wheel's position and even the audio settings with the click of a button. They also have a backup lock that blocks the vehicle from starting if it is not connected to the key.

This technology prevents drivers from not locking their cars properly, especially when searching in bags or purses for keys in parking lots with people who are not familiar with the area or where crime is high. A lot of systems will alert drivers when the battery in their keys is not fully charged, though this feature may differ from manufacturer to manufacturer.

Convenience

If you're in a hurry get somewhere, the smart key makes entering your car as easy as it can be. By pressing the button on the trunk release lever or door handle, you can lock, unlock and get into your vehicle. Key fobs can also connect to your phone to track charging locations, charging times and other details about the vehicle, according to Popular Mechanics.

You don't want to accidentally lock your keys in the car. The key fob communicates with an antenna in the vehicle to determine if it's in range. If it's not, the engine will not start. This will deter thieves from taking your vehicle and then selling parts of it.

The smart key uses rolling codes to ward off hacking attempts as well as cloning, according BMW. A computer inside the vehicle recognizes the code and validates it prior to launching the engine. Most systems also have a backup mechanical system in the form of an invisible key blade to be used for styling purposes.

Modern smart keys also recognize which keys are in use and adjust the car settings accordingly, notes How Stuff Works Electronics. If you start the vehicle while holding the key in your palm for instance, the windows and the sunroof will be opened to let air circulate the interior. You can also set an upper limit on speed that will only be applied when the vehicle is started with the selected key, which can 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 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, press and hold the lock button while pressing the unlock button.

This will stop your smart key fob from having to transmit or receive radio waves. This will greatly extend the life of your battery. You can reactivate this feature by pressing the unlock and lock buttons once more.

Certain smart keys also come with anti-theft functions that stop them from being copied by thieves. For instance, Mercedes-Benz smart keys use rolling codes to block unauthorized vehicle access. When the smart key is put in the ignition, a computer within the car checks the code in milliseconds before starting the engine. BMW makes use of a Display Key with a small LCD screen with a color. This lets drivers lock their vehicles, unlock their doors, and start them without removing the smart car key coding key from their pocket.

If you're considering purchasing a new car that has a smart key, or require the battery of your smart key fob replaced, call Pop-A-Lock to get a quick and easy service. Our mobile locksmiths will change the battery on any smart key, and will help you set it up so that your car recognizes it.

Special Cases

Although smart keys aren't safe from theft, they do assist to hinder thieves. Smart keys utilize rolling security codes that prevent hackers, and when put in the ignition, the vehicle's computer verifies the code within milliseconds. Mercedes-Benz invented this technology, which is currently used by luxury car brands.

Another great feature is that most smart key systems will continue to operate even if the user has forgotten the key in the trunk, left it at a restaurant or lost it during hiking. Some systems will alert the driver when the battery is depleted. Some brands offer key covers specifically designed for smart keys that protect the fob from damage.