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What is a Smart Key Car Key? Also known as keys that are in proximity also known as key fobs, keys or remote keys, smart keys work to unlock doors and start engines without the driver having to insert an actual key. They communicate by radiofrequency signals. In addition, it helps protect vehicles by stopping attempts to hotwire. Smart keys also broadcast unique encrypted signals that prevent them from being used by other vehicles driven by drivers. smart car key replacement of inserting a key into an ignition slot instead, you can lock and unlock your car simply by touching the door handle or trunk. A lot of modern cars also have a feature that allows you to start your engine remotely. This is especially useful if you are bringing in groceries or transporting passengers or equipment. This technology is designed to stop theft of vehicles. Smart keys send out encrypted signals instead of a single frequency like a standard keyfob. This stops other vehicles from receiving and responding to the same signal. This explains How Stuff Works Electronics. Certain manufacturers also incorporate an electronic chip in the vehicle that can recognize the unique fingerprint of every key. This helps to ensure that only authorized users use it. This is useful should you lend your vehicle to friends and family members. Certain smart keys can also store user settings, so that the steering wheel, seat mirror, seat, and stereo presets are automatically set when the key is within the range of the vehicle. Some smart keys can be set up to prevent the vehicle from exceeding a certain speed limit when started with that key. This can help keep novice drivers safe and is useful if you have young children in the back of the vehicle. Security Traditionally keys for cars have been cut out of metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys have a specific chip which sends an antenna signal to your car. This signal is acknowledged by the vehicle when the driver presses on the door handle or trunk release. It is now impossible to lock the keys inside your vehicle. The signal that the smart key sends to your car is encrypted, which means only the owner has the right to use it. In addition, most models will turn off the engine if it has not been launched in the past few minutes. This is especially useful in case you're in a hazardous zone or need to leave the vehicle for reasons other than at a gas station. In addition, if the smart key battery gets depleted during a trip, many systems come with a backup plan to open and start the vehicle. The backup system involves placing the key into a slot, or holding it close to a certain location in the cockpit, where the energy is transferred to an electric motor. Certain manufacturers also include an key blade that is an emergency mechanical lock in the key which can be used to open the trunk and begin the car if required. Battery Life Many newer cars have keyless entry systems as well as push-button starters. They are controlled by a smart fob which communicates with the car through proximity technology. These systems utilize a tiny transmitter powered by a lithium coin-sized battery. As with all batteries it will eventually need replacement. Although smart key fobs are made to last for years but they may suddenly lose power. If the fob is dead, you won't be able to lock or start the car, even if you keep it near the front door, and the key fob light is flashing. It is not uncommon for the transmitter of a smart key to drain the battery. The smart key will send a signal every time you press a button. However, most of the times, it doesn't do anything. A single lock/unlock signal uses only a fraction of the battery power in the fob and, therefore, there's several years worth of signals' worth of battery life for the average smart key battery. The fob may also drain the battery when it is placed near other devices that emit electromagnetic field, such as phones and computers. These devices create their own magnetic fields, which could affect the fob's transmitter and cause it to function slower. In certain cases, the fob may even cease to function completely if the fob is left too close to these devices, as per RepairPal. Maintenance In contrast to the traditional car key, a smart key uses technology to manage the locks on your vehicle as well as perform other functions. It works by transmitting a signal to antennas that are placed both inside and outside your vehicle. These antennas are able to detect the fob's signals and communicate with the car's computer. The car interprets the signal, allowing you to start or close it without having to use the physical key. The fob is now a center of numerous electronic features on new automobiles. The most obvious ones are locking and unlocking, remote starter, and chirping sounds that help you find your vehicle in a parking lot. Some fobs allow you to store different settings for different drivers, as well as remotely open windows and the sunroof. The fob is a complex electronic device that includes an integrated board. It can be damaged if it is placed in a position that is too harsh or exposed to extreme cold or heat. The transmitter may be damaged if hit or dropped. The battery contacts could be bent. These problems can be difficult to determine and fix. You can use your phone to overcome this issue to see if it works. However it is recommended to keep an extra key in your pocket or case. You can buy a generic smart key replacement for up to 70% less than OEM keys and comes with a three-year warranty.