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What is G28 Car Keys ? Sometimes referred to as proximity keys Key fobs, proximity keys, or remote keys, smart keys work to unlock doors and start engines without the driver needing to insert an actual key. They communicate with each other by using radiofrequency signals. In addition, it helps keep cars secure by preventing attempts to hotwire. Smart keys emit unique encrypted signals that prevent access to other vehicles. Convenience Instead of inserting the key into an ignition slot instead, you can lock and unlock your vehicle simply by touching the handle on your door or trunk. A lot of modern cars also have the option to start your engine remotely. This is particularly useful if you're bringing groceries into the vehicle or transporting passengers, or equipment. This technology is designed to help to prevent theft of vehicles. Instead of transmitting a single frequency signal, like a traditional key fob smart keys send out several encrypted signals to the car's embedded antennas when you walk towards it. This stops other vehicles from receiving and responding to the same signal. which explains how Stuff Works Electronics. Some manufacturers also use a computer-chip in the vehicle that recognizes the unique fingerprint of every key. This makes sure that only authorized users use it. This can be helpful if you lend your car to family members or friends. Some smart keys also store user preferences, so that seat, steering wheel mirror, seat and stereo presets are automatically set when the key is in the range of the vehicle. For added convenience, some smart keys can be set to stop the vehicle from exceeding a particular speed limit when activated with a specific key. This will help keep new drivers safe and can be useful if you have young children in the back. Security Traditionally keys were made from metal to open the ignition. With the advancement of smart keys, this is no longer the case. Smart keys come with a chip that transmits a signal from the antenna to your car. The car can detect this signal when the driver presses on the trunk release or door handle. This means that it's not possible to lock your keys into your car. The signal sent by the smart key to your vehicle is secured so that only you are able to use it. In addition, most models will turn off the engine in the event that the vehicle was not launched in the past few minutes. This feature is especially useful if you are in a dangerous location or you need to leave your vehicle for any reason. A number of systems also include an alternative system for opening and starting the car when the battery of the smart key runs out while you are on a ride. The backup system typically involves placing the key in the slot or placing it in a certain area of the cockpit, which transfers energy to an electric motor. Certain manufacturers offer a mechanical key blade that can be used in an emergency situation to open the trunk or to start the vehicle. Battery Life Many newer cars have keyless entry systems as well as push-button starters. These are controlled by a smart fob which communicates with the car using proximity technology. These systems are powered by a small transmitter that is powered by a lithium coin-sized battery. Like all batteries it will eventually need replacement. Most smart key fob batteries last for a while However, this doesn't mean that they won't go out of power and stop working abruptly. If the fob is dead, it won't be able unlock or start your car in the event that you put it close to the front door. It's not uncommon for the transmitter in a smart key to drain the battery. It transmits a signal to the car every time you press the button, but most of the time the smart key is not doing anything. The battery of a smart key is large enough to provide several years of signalling to lock and unlock. The fob also drains the battery when it is placed near other devices that emit electromagnetic fields, such as phones and computers. These devices emit their own magnetic fields which can interfere with and slow down the fob transmitter. RepairPal states that the fob might not function if it's placed too close to the gadgets. Maintenance Smart keys differ from traditional keys in that they utilize technology to control the security of your vehicle as well as perform other functions. It operates by transmitting a signal through antennas that are placed both inside and outside your vehicle. These antennas detect the fob's signal and connect with the car's computer. The car interprets the signal and allows the user to open or start it without the physical key. New cars are loaded with modern electronic features, and the fob has become a hub for many of these functions. The most obvious uses include locking and unlocking your car, remote start and chirping to assist you in finding your car in a parking space. Some fobs allow you to save specific settings for different drivers and remotely open windows and sunroofs. The fob is a complicated electronic device with an integrated circuit board that can be damaged if used too hard or exposed to extreme cold or heat. The transmitter may be damaged if it is dropped or banged. The battery contacts could be bent. These problems can be hard to pinpoint and resolve. You can try using your phone to bypass the problem and see if this works however, it's a good idea keep a spare key in your pocket just in case. You can purchase an alternative to the majority of OEM smart keys for up 70% less and comes with a three-year, better-than-OEM guarantee.