How many electronic throttles are there in the car?

Common is a throttle! But there are 2 or 4 BMW M Series and Mercedes amg! The most existing throttles on the market are w 16 engines, with independent throttles per cylinder *** 16 throttles! The composition of electric throttle can be roughly divided into the following parts: throttle, electromagnetic driver, potentiometer, controller (some of which are not directly managed by ecu) and bypass valve. Its fault characteristics are divided into two categories: hard fault and soft fault. Hard fault refers to mechanical damage, and soft fault refers to dirt, maladjustment, etc.