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Vehicle Smart Key Technology

The technology of smart keys in automobiles allows drivers to open and start their car by simply rubbing the door handle or placing the key into the pocket. It also allows for many other adjustments, including seat position the internal temperature setting and mirror positioning.

This could also create security worries.

Security

Smart keys are sophisticated electronic keys that communicate with a vehicle through one of the antennas that are embedded in the vehicle to unlock doors and to start the engine. Smart key fobs, in contrast to traditional keys that emit the same frequency each time they're pressed, send encrypted signals which are only compatible with the vehicle to which they belong. This makes it harder for criminals with a technological edge to spoof or intercept the signal, and then use your key to steal your vehicle.

For instance, Mercedes' system -- called Keyless Go -- has an internal transponder which can identify the driver's keys. The Smart Key automatically unlocks and opens the doors and tailgate when it is within 1.5 meters. It also allows you to start the engine by pressing a button on its key.

Additionally certain smart keyslike those made by BMW have their own user settings that allow the driver to adjust the mirrors, seat and steering wheel position and audio preferences at the touch of a button. They also come with a backup lock that prevents the vehicle starting without the key.

This technology protects drivers from being unable to lock their vehicle and causing damage to their vehicle, particularly when searching bags or purses to find keys in a parking lot with strangers or on a busy street where crime is high. Many systems also alert drivers when their keys are running low on battery, but this feature varies by manufacturer.

Convenience

If you're in a hurry get somewhere, the smart key makes getting into your car as simple as possible. By pressing the button on the trunk release lever or door handle, you can open, lock and begin your vehicle. The key fob can also connect to your phone to keep track of charging locations, charging times and other details about the vehicle, according to Popular Mechanics.

You shouldn't lock your keys inside the car. The key fob communicates with an antenna inside the vehicle to determine if it's within range. If it's not, the engine won't start. This can deter thieves who would take your vehicle and sell its parts.

The smart key also uses rolling codes to protect against hacking attempts and cloning, reports BMW. The computer in the vehicle can recognize and verify the code before starting the motor. The majority of systems also have a mechanical backup in the form of a key blade that's hidden to serve as a styling tool.

Modern smart keys also know the type of key being used and adjust the settings of the vehicle accordingly, notes How much is a replacement smart car key Stuff Works Electronics. For instance, if you turn on the car while holding the key fob in your hand, the windows and the sunroof are opened to let the cabin air dry. You can also set the speed limit which will only be applied when the vehicle is started using the selected key, which could be useful if you loan your car 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, hold the lock button, then press the unlock button.

This will prevent your smart key fob to transmit or receive radio waves. This will dramatically extend the life of your battery. You can always restart this function by pressing the unlock and lock buttons once more.

Some smart keys have anti-theft functions that prevent them being copied by thieves. For example, Mercedes-Benz smart fortwo key replacement keys use rolling codes to block unauthorized access to vehicles. When a smart key is inserted into ignition, a computer in the car verifies the code in milliseconds before beginning the engine. BMW also has a similar system with its Display Key, which comes with a small LCD color touchscreen on the smart key for added convenience, and lets drivers lock or unlock their vehicles without ever taking the key from their pockets.

Contact Pop-A-Lock if your need to replace the battery in your smart key fob should you be thinking of buying a car with a smart key replacement-key. Our mobile locksmiths will replace the battery of any smart key, and will help to set it so that your car recognizes it.

Special Cases

Although smart keys aren't theft-proof, they do help to discourage thieves. Smart keys employ rolling security codes to protect against the hacking of keys, and when they are placed in the ignition, the vehicle's computer validates the code within milliseconds. This technology was invented by Mercedes-Benz and is currently used by many luxury car brands.

Another benefit is that the majority of smart key systems will continue to work in the event that the user forgets the key in the trunk or left it at an eatery or lost it on an excursion. Certain systems will notify the driver when the battery is not fully charged. Some brands offer key covers specifically designed for smart keys, to shield the fob from damage.