Vehicle Smart Key Technology

The smart key technology that is found in automobiles allows drivers to open and start their car by just touching the door handle, or placing the key into the pocket. It also enables a range of other adjustments, including seating positions as well as internal temperature settings stereo presets, and mirror positioning.

This can also lead to security concerns.

Security

Smart keys are advanced computerized key fobs that communicate with vehicles via one of the antennas built into the car to unlock the doors and begin 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 car to which they belong. This makes it more difficult for tech-savvy criminals to detect or spoof the signal, and then use your key to steal your vehicle.

For example, Mercedes' system -known as Keyless Go -- has an internal transponder, which identifies the key of the driver. The Smart Key automatically unlocks and opens the doors and tailgate when it is within 1.5 meters. It also begins the engine by pressing the key.

Certain smart keys, like the ones from BMW, also have user-specific settings that allow the driver to adjust the seat, mirrors and the steering wheel's position and even the audio settings with the press of a single button. They also have the backup lock, which prevents the vehicle from starting if the key is not in the ignition.

This technology helps keep drivers from locking their vehicles, particularly when they have to search their purse or backpack for keys in a parking lot full of strangers or in a busy street with high rates of crime. Some systems will also notify motorists when the battery for their key is low, though this feature may differ from manufacturer to manufacturer.

Convenience

The smart key is perfect for those who are on the move and need to get to their destination. By pressing the button on your trunk release or door handle, you can open, lock and get into your vehicle. Popular Mechanics explains that the key fob can also be used to monitor charging or location as well as other information about your vehicle.

You shouldn't lock your keys in the car. The key fob communicates to an antenna inside the vehicle to determine whether it is within the range. If it's not, the engine won't not start. This helps deter would-be thieves who could steal your vehicle to sell its parts.

The smart key also makes use of rolling codes to prevent hacking attempts and cloning, reports BMW. A computer in the vehicle is able to recognize the code and confirms it prior to launching the engine. Most systems have a physical backup system in the form of a hidden key blade.

Modern smart car key keys also recognize the type of key being used and adjust the vehicle settings as needed, according to How Stuff Works Electronics. For example, if you switch on the car while holding the key fob in your hand the windows and sunroof can be opened to ventilate the cabin. You can also set the speed limit which will only apply when the vehicle is started using 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's smart chip from sending or receiving radio signals, which will extend its battery life significantly. You can always reactivate the function by pressing both the unlock and lock buttons again.

Certain smart car key programming keys also come with anti-theft features to prevent them from being copied by thieves. For example, Mercedes-Benz smart keys use rolling codes to stop unauthorized access to the vehicle. The computer in the car will check the code every millisecond after the smart key is introduced. BMW offers a similar system with its Display Key, which has an LCD touchscreen on the smart car key replacement key for ease of use and enables drivers to lock and unlock their cars without ever removing it from their pockets.

Contact Pop-A-Lock if your need to replace the battery in the smart key fob you have or considering buying a car with a smart-key. We can replace the battery in any smart key and our mobile locksmiths will assist you in setting the system to make sure your vehicle recognizes it.

Special Cases

Although smart keys aren't security-wise, they can be used to deter thieves. Smart keys employ rolling security codes to avoid theft, and when placed in the ignition, the car's computer validates the code within milliseconds. This technology was developed by Mercedes-Benz and is now used by many high-end car brands.

A smart key system will work even if you don't remember the key in the trunk or leave it in an establishment. Some systems will also alert the driver when the battery is low. Certain brands have key covers designed specifically for smart keys to guard the fob from damage.