Is it legal to brush the car for the first time?

The first-order program of car brushing is legal, and the specific program is as follows: 1. The first-order program of Ecu is actually to adjust the ignition advance angle or fuel injection parameters of the engine within the scope allowed by the original accessories without modifying other hardware, but the first-order program has no obvious improvement in power; 2. Brushing the first-order program can reduce the frustration of some small-displacement vehicles during downshifting. Brushing the first-order program can't really improve the vehicle; 3. If the effect is great, it is estimated that the first-order program will be adjusted when the vehicle leaves the factory, but it will not cause too much damage to the vehicle. The biggest disadvantage of brushing the first-order ecu may be that it will more easily lead to carbon deposition on the accelerator of the car.