How often does Volkswagen clean the throttle?

Everyone is concerned about "how often does the public clean the throttle?" Let me explain something to you:

Volkswagen cleans the throttle every 20,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. There are two types: traditional cable type and electronic throttle. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. This combustible mixture is connected with the air filter and the engine block. Take Touran X as an example: the length, width and height of this car are 4905mm, 1989mm, 17 19mm, the wheelbase is 2980mm, the body type is 5-door 5-seat SUV, the gearbox is 7-speed dual clutch, and the top speed is 200 kilometers per hour.