Is VIOS accelerator dirty easily a quality problem?

Good evening. If the throttle is dirty, it is not a quality problem. Although the dust is blocked by the air filter system when the car is driving, it will also enter the throttle combustion chamber with a small amount of dirt, forming sludge and carbon deposits on the surface of the throttle valve plate. The throttle valve should be cleaned at least once every 25,000 kilometers. Electronic throttle generally needs to be matched.