Vehicle key

There are several types of car keys, which differ in their functionality and technology. Here are the most common types of keys:

1. Mechanical key

  • Description: This is the classic car key that only operates a mechanical lock cylinder.
  • Function: It is inserted into the ignition lock and turned manually to start the car.
  • Safety feature: Often lacks electronic safety functions and is mainly used in older vehicles nowadays.

2. Transponder key

  • Description: A mechanical key that also contains an electronic transponder chip.
  • Function: The key must be inserted into the ignition lock, but the engine will only start if the control unit recognizes the signal from the transponder.
  • Safety feature: The vehicle's immobilizer checks the transponder chip and prevents the engine from starting if the signal is not recognized.

3. Radio remote control key (Remote Key)

  • Description: A key that, in addition to its mechanical function, has a radio remote control for the central locking system.
  • Function: Allows the doors to be opened and closed remotely at the touch of a button. The key is still inserted into the ignition to start the vehicle.
  • Security feature: Often combined with a transponder to control the immobilizer.

4. Keyless-Go or Smart-Key (Keyless access system)

  • Description: A key that the driver can keep in their pocket or purse, as the vehicle automatically recognizes that the key is nearby.
  • Function: Doors can be unlocked by touching the door handle, and the vehicle is started by pressing a button.
  • Security feature: The system uses encrypted signals between the key and the vehicle to ensure security. It can be equipped with additional features such as an alarm or a motion sensor.

5. Card or chip key (insert key)

  • Description: A card or small chip that performs the functions of a key.
  • Function: It is inserted into a special slot in the vehicle or simply carried with you to perform the same functions as a smart key.
  • Security feature: Encrypted signal similar to a smart key, sometimes with additional security mechanisms such as PIN codes or biometrics.

6. App-based key (digital key)

  • Description: A smartphone app that acts as a key.
  • Function: The vehicle can be unlocked, locked, and started via smartphone. This type of key also allows the key to be shared digitally with other users.
  • Security feature: The app typically uses multi-stage authentication processes and encryption to ensure security.

7. Emergency key

  • Description: A small, often hidden mechanical key that is integrated into smart keys.
  • Function: Can be used in emergency situations, e.g., when the smart key battery is dead, to mechanically unlock the doors.
  • Security feature: Offers a simple backup solution, but without additional electronic security features.

Summary:

These key types represent the progress from simple mechanical systems to complex electronic systems that increase both comfort and safety for the driver. Generally, the more modern the vehicle, the more advanced the type of key used.