Smart Key

A smart key, also known as a passive key or a push-to-start key, is a keyless entry system that allows the driver to unlock and start the vehicle without using a physical key. Provided the key is in close proximity to the vehicle, the smart key fob communicates with the vehicle’s onboard computer system using radio-frequency identification (LF/RF), Ultra Wide Band (UWB) or Bluetooth technology.

When the driver approaches the vehicle, the smart key fob sends a signal to the vehicle’s computer, which then unlocks the doors automatically. Once inside the vehicle, the driver can start the engine by pressing a button on the dashboard or console, without needing to insert a physical key into the ignition.

In addition to the convenience of keyless entry and start, smart key fobs may also include additional features such as remote start, which allows the driver to start the engine from outside the vehicle, and hands-free liftgate or trunk access, which allows the driver to open the trunk or liftgate by waving their foot to activate a sensor under the rear bumper.

Smart key fobs are widely used in modern vehicles, and have become a popular feature due to their convenience and security benefits. Alternative usage together with mobile phone access or other smart key sharing is also a benefit.