What is the purpose of flashing the ECU in a sedan?

[DiLevi]

Flashing the ECU in a sedan can optimize parameter settings to achieve goals such as increasing horsepower output, enhancing torque, or reducing fuel consumption. Increasing horsepower and torque will correspondingly raise fuel consumption, while decreasing them will lower fuel consumption. For a car engine, the ECU is akin to the relationship between computer software and hardware. A more precise analogy would be that the car ECU is like the BIOS on a computer motherboard, capable of regulating the engine's power output values. Flashing the ECU merely optimizes the parameters of the car engine and ECU, rather than pushing the engine to operate at its limits. The optimization is conducted on the basis of ensuring service life and safety, while also maintaining an absolute safety margin, thus it does not affect the car's safety or lifespan.