Nissan throttle plate has electrostatic coating behind it.

A circle is painted around the throttle plate to prevent dust, static electricity and glue from sticking, and also to prevent the throttle plate from being stuck.

There is indeed a special coating on the accelerator of a car, similar to the coating in a non-stick pan. Its function is to prevent dust and static electricity and reduce the influence of glued bamboo. At the same time, a special lubricant is coated on the throttle shaft to make the throttle run smoothly.

Car owners who often clean the throttle will find that the cycle of cleaning the throttle is getting shorter and shorter, and the final result is that the throttle cannot be started after cleaning, or the throttle can only be replaced when the idle speed is high. The reason is that the coating on the throttle was washed off during the cleaning process.