
Smart keys take the technology of car keys an extra step. These keys can open your doors and start your car at the push of a switch. These keys are more expensive than standard key fobs and are harder to replace.
You can purchase a replacement smart key from your local dealer or from an expert locksmith. Both are similar, however, they offer different services.
Keyless Entry System
The keyless entry feature of your car gives you a higher level of security that enables you to open your vehicle and start it without having to remove the key from your pocket. It works by sending the wireless signal which is received by a receiver built in the interior of your car. The receiver then activates the doors, and it starts the engine.
The key fob is an electronic chip that contains an unique identifier that is paired with the receiver of your car. When you turn your key into the ignition, the matched pairs signals that you're near to the car. The car is then able to open the door or begin the engine.
If you lose your smart key, it could be a headache to get it replaced. In most cases, you'll have to visit a dealer to prove ownership. They will then connect your new key with your car.
In some modern vehicles, you can use an app to replace the key fob. These systems are referred to as "keyless entry" and can be used to start and open the vehicle, as as lock and unlock the doors. This kind of system can be installed as an add-on to your factory remote or as a part of a custom security system. This type of system is also popular in apartment complexes and corporate buildings.
Transponder Keys
In essence, it's an ignition key for cars that has a microchip built right into it. The chip emits signals when it's close to the ignition in order to activate it. This makes it impossible for anyone to start your vehicle without the original keys, which can help prevent the theft of your vehicle.
The microchip contains a digital serial number that authenticates the key to the vehicle. When the key is located close to the ignition, the chip emits an low-level radio signal which a special receiver inside the car detects. The chip then sends a signal to the engine control unit (ECU) to activate the ignition and start the car.
Key fobs are not just a security device but can be used to open your doors as well as open the windows and sunroof. It can be used to turn off your immobilizer which blocks the engine of your vehicle smart key when the key is taken out of the ignition.
Certain keys with chip technology are more complex and have multiple levels of security. For instance, GM's VATS keys come with an anti-theft system that stops your car from starting when the wrong key is used. This is accomplished by using the key's resistor, which has one of the 15 preset resistances within the key.
If you are unable to locate your smart key, or it is lost, getting an exchange from the dealer might be a good option. However, this could be costly and you'll likely be required to pay a locksmith or a car dealer to reprogram the new key to your car.
Smart Keys Keys
The days of fiddling with the keyhole or pressing a button are gone - a few car manufacturers now offer Smart Car Key Fob Programming keys as an option. They're shaped like plastic cards and have an electronic sensor that connects to the computer in your vehicle. They can unlock your car, open doors, and turn on the ignition, all without the need for a physical key.

Smart keys will also alert you when the battery is low. You can either purchase an additional key from a locksmith or follow the instructions in the owner's manual to replace it.
You can purchase a replacement smart factory key by calling or searching the dealer's inventory. If you need an additional key, you may also purchase a compatible aftermarket key from a dealership selling car parts. They can pair it with your current key to save dealer charges. You can then use it as a backup key in case you lose your primary key.
Smart Key Replacement
Many modern vehicles are equipped with smart keys that unlock doors and even start the engine. They also perform other functions without needing to physically touch or even hold their key fob. These keys communicate with antennas which detect and recognize the exact signal from the key fob.
The convenience of having a smart key for a car is the primary benefit. It will eliminate the need to mess about with keys as you exit the driveway. This could result in drivers locking themselves out of the vehicle. It makes the process of starting and entering the vehicle much faster by eliminating the need to search for and press buttons on the traditional remote.
Smart keys also provide additional security. Smart keys emit a distinct encrypted signal that is not identical to other key fobs. This makes it more difficult for thieves to copy your signature.
Smart keys could, however lose or break as with any kind of car key. Fortunately, a locksmith can help you replace yours. They can reprogram the new fob to connect to the computer in your car to allow you to lock it and restart it. All they require is a new battery. Open the smart car key fob programming key fob and then take out the battery that was in it. Place the new battery in the same holder. Make sure that the edges of the key fob are flush.