Smart Roadster keys contain a transponder that is recognized by the vehicle’s immobilizer system. This transponder checks if the key is original and provides the necessary codes for the vehicle to start. When you replace your key, the immobilizer system needs to be coded to recognize your new key.
Coding a Smart Roadster key is done using a programming device. The programming device is connected to the vehicle’s OBD-II (On-Board Diagnostics) port and reads the key codes of the vehicle. Then, it loads the code of your new key into the transponder to make it recognize your vehicle.
The usage of the programming device may vary depending on the vehicle brand and model. However, you can generally follow these steps:
- Connect the programming device to the OBD-II port.
- Turn on the device and select the vehicle brand and model. Then, select the key programming option.
- The programming device will read the existing key codes of the vehicle. This process may take a few seconds.
- Insert your new key into the programming device and start the programming process.
- The device will load the code of your new key into the transponder. This process may take a few seconds.
- Once the key programming is completed, remove the programming device from the vehicle and test your new key.
When the programming process of your new key is completed, your vehicle will recognize your new key and allow you to start your vehicle. However, if you are inexperienced with the usage of programming devices or encounter any issues, I suggest that you seek assistance from an authorized service center or an auto electrician.
Lastly, before programming your new key, ensure that you have the correct key for the key coding process. Before purchasing a new key, read the vehicle’s user manual and learn the correct key type and coding method.