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Smart keys are also known as proximity keys or key fobs. They can be used to unlock doors and to start engines without a driver having to insert a physical keys. They communicate with each other using radiofrequency signals.

Among other things, this helps to protect cars by preventing attempts at hotwiring. Smart keys emit unique encrypted signals that stop access to other vehicles.

Convenience

Instead of inserting keys into an ignition slot to lock and unlock your car by merely touching the handle of the door or trunk. A lot of modern cars also have a feature that allows you to remotely start your engine. This is particularly helpful when you're bringing groceries in or transporting equipment, passengers, or passengers.

This technology is designed to prevent vehicle theft. Instead of transmitting only one frequency signal like a traditional key fob does, a smart key sends out various encrypted signals to the car's antennas embedded in it when you approach it. How Stuff Works Electronics explains that this is a way to prevent other cars from receiving and responding the same signal.

Some manufacturers also include an electronic chip in the vehicle that detects the unique fingerprint of every key. This can help ensure that only authorized users use it. This is helpful in the event that you lend your vehicle to family members or friends.

Some smart keys can also store user preferences, so that seat, mirrors and steering wheel adjustments, as and stereo presets can be set automatically when the key is within reach of the vehicle. Certain smart keys can be set up to prevent the vehicle from exceeding the speed limit when it is started using that key. This can help keep unexperienced drivers safe, and is particularly helpful if you have young children in the back of the vehicle.

Security

Traditionally keys were cut from metal to open the ignition. With the advent of smart key technology, it is no longer the case. smart keys for cars keys have an exclusive chip that sends an alert to your car's antenna. This signal is then recognized by the vehicle when the driver presses a button on the handle on the door or trunk release. This means it's impossible to lock your keys in your car anymore.

The smart key's signal to your vehicle is encrypted, ensuring that only you can use it. Most models also disable the engine when the vehicle hasn't been running for some time. This feature is especially useful in case you're in a hazardous zone or need to leave the vehicle for reasons of any kind, like at a gas pump.

Additionally, if a smart key battery is depleted during a ride, a lot of systems come with a backup plan to open and start the vehicle. The backup method typically involves placing the key in an opening or keeping it in a particular area of the cockpit, which transfers energy to an electric motor. Some manufacturers also have an emergency mechanical key blade in the key which can be used to open the trunk and start the car in case of need.

Battery Life

Most newer cars have keyless entry and push-button starting systems which are controlled by a key fob that utilizes proximity technology to connect with the car. These systems utilize a tiny transmitter that is powered by a coin-sized lithium battery. As with all batteries it will eventually need replacement.

Even though smart key fobs are made to last for years however, they can suddenly lose power. A dead key fob means you are unable to unlock or start the car even if you place it near the front door, and the key fob's light blinks.

It is not uncommon for the smart key's transmitter to drain the battery. It sends a signal back to the car each time you touch a button, but most times the smart key does nothing. A single signal to lock or unlock takes only a fraction of the fob's battery power and, therefore, there's several years ' worth of signals' worth of battery life for the average smart key battery.

The fob also tends to drain the battery if you keep it close to other devices emitting electromagnetic fields, such as phones and computers. These gadgets emit magnetic fields of their own which can interfere with and slow down the fob transmitter. In some instances the fob might be unable to function when it is placed too close to these devices, according to RepairPal.

Maintenance

Contrary to the traditional metal car key for smart car (listen to this podcast), a smart key utilizes technology to control the locks on your vehicle and perform some other functions. It functions by sending signals from the fob to antennas in and outside the vehicle. The antennas pick up the signal and then communicate with your car's computer. The car interprets the signal, permitting you to start or open the door without a physical key.

New cars are loaded with the latest electronic technology, and the fob is now an interface for many of these functions. The most obvious functions are locking and unlocking your car, remote starting and chirping sound to assist you in finding your car in a parking lot. Some fobs also let you save specific settings for different drivers, as well as remotely open windows and sunroofs.

The fob is an intricate electronic device that has an integrated board that can be damaged if placed in a position that is too harsh or exposed to extreme cold or heat. The transmitter can be broken when it's damaged by a fall or a bang and the battery contacts may also be bent.

These issues can be challenging to identify and resolve. You can utilize your smartphone to overcome this issue to check if it is working. However you should always keep an extra key in your wallet in a case. You can buy a generic replacement for the majority of OEM smart keys, which costs up to 70 percent less and comes with a three-year better-than-OEM warranty.