What is a
Smart Key Car Key?
Smart keys are also known as proximity keys or key fobs. They are used to unlock doors and start engines without a driver having to insert a physical key. They communicate via radiofrequency signals.

Among other things, this helps to protect cars by blocking attempts to hotwire. Smart keys also transmit unique encrypted signals to prevent them from being used by other vehicles driven by drivers.
Convenience
You can lock and unlock your vehicle without having to insert the key into the ignition slot. Simply touch the handle of the door or trunk. A lot of modern cars come with a feature that allows you to start your car from a distance. This is particularly helpful when you're bringing groceries in or transporting equipment and passengers.
This technology is intended to protect against theft of vehicles.
smart car keys replacement keys send out encrypted signals instead of a single frequency, like a normal keyfob. What does this mean? Stuff Works Electronics explains that this stops other vehicles from receiving and responding to the same signal.
Some manufacturers also include computers in their vehicles that detects the unique fingerprint of every key. This makes sure that only authorized users use it. This can be beneficial should you lend your vehicle to friends and family members.
Certain
smart car key coding keys can also store user preferences, so that the steering wheel, seat mirror, seat and stereo presets are automatically set when the
key for smart car is in range of the car. Some smart keys can be set up to prevent the vehicle from going over a certain speed limit when it is started using that key. This can help keep novice drivers safe and can be beneficial if you have young children in the back of the vehicle.
Security
Traditionally keys were cut from metal to unlock the ignition. With the advent of smart keys, it is no longer the case. Smart keys come with an electronic chip that transmits the signal to your car's antenna. The vehicle recognizes this signal when the driver presses on the trunk release or door handle. This means that it's not possible 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. Additionally, the majority of models will disable the engine if the vehicle has not been launched in the past few minutes. This is especially helpful if you are in a risky area or have to leave your vehicle for any reason.
Furthermore, if the smart key battery is depleted during a trip, many models have a backup system of opening and starting the vehicle. The backup system involves inserting the key into the slot, or putting it close to a specific area in the cockpit where energy is transferred to an electric motor. Certain manufacturers also include an emergency mechanical key blade hidden in the key which can be used to open the trunk and start the car should it be needed.
Battery Life
Most newer cars come with keyless entry systems as well as push-button starters. They are controlled by a smart fob that communicates with the car through proximity technology. These systems use a tiny transmitter that is powered by a coin-sized lithium battery. Like any other battery that will eventually require replacement.
Most smart batteries for key fobs last for a while however, this doesn't mean that they won't fail to power up and stop functioning at any time. A dead key fob means that you are unable to unlock or start your car, even if you keep it close to the front door, and the key fob's light blinks.
It is not unusual for the transmitter of a smart key drain the battery. It sends a signal to the car each time you press an option, but the majority of the time, the smart key is not doing anything. A single signal to lock or unlock takes only a fraction of the battery power of the fob which means that there's several years ' worth of signals' worth of battery life left in the average smart key battery.
The fob also drains the battery if kept near other devices that emit electromagnetic field such as computers and phones. These devices emit magnetic fields of their own, which can interfere and slow down the fob's transmitter. RepairPal states that the fob may stop working if it is placed too close to the gadgets.
Maintenance
Smart keys differ from traditional keys in that they use technology to control the locks of your vehicle as well as perform other functions. It operates by transmitting a signal to antennas situated inside and outside of your vehicle. They detect the fob's signal and connect with the car's computer. The car interprets the signal, and allows you to begin or open it without the physical key.
New cars are packed with high-tech electronic features and the fob has become an instrument for many of these functions. The most obvious ones are locking and unlocking, remote start, and chirping sounds to aid in finding your car in a parking spot. Some fobs allow you to save various settings for various drivers, and remotely open windows as well as the sunroof.
The transmitter is a complicated device that has an integrated circuit board and it is susceptible to damage through repeated use or exposure to cold or heat. The transmitter could be damaged when it is hit or dropped and the battery contacts can also become bent.

These problems can be difficult to diagnose and resolve. Try using your phone to solve the problem and see if it works however, it's a good idea keep a backup key in your pocket to use in case. You can purchase an ordinary
smart key programing key replacement that's up to 70% less than OEM keys and comes with a three-year warranty.