The process of copying data from a Hyundai vehicle's Engine Control Unit (ECU) to a new or replacement ECU is known as Hyundai ECU cloning. This procedure is usually performed when upgrading to a different ECU model or replacing a malfunctioning ECU with a new one. By ensuring that the replacement ECU operates exactly like the original, cloning helps to preserve the vehicle's performance, compliance with emissions regulations, and interoperability with other systems.

The general procedure for cloning a Hyundai ECU is as follows:

 Data extraction: Using specialist diagnostic tools or software, the original ECU's data—which includes configuration settings, vehicle identifying information, and other crucial parameters—is read

 Data Transfer: The extracted data is then either programmed directly into the replacement ECU or copied into the memory chip of the new ECU.

Verification: After the data transfer is finished, technicians undertake diagnostic tests on the car to ensure that everything functions as it should and to verify that the cloned ECU is running correctly.

ECU cloning is particularly useful when reprogramming the ECU is not feasible or when the original ECU cannot be repaired. It makes replacement easier and eliminates the need for extensive reprogramming or reconfiguration of the car's systems.

It is important to keep in mind that only qualified professionals should do ECU cloning in order to ensure accurate and reliable results.