The Fuel Pressure Regulator VCV BK2Q 9358 AA is generally installed at the inlet of the high-pressure fuel pump. It is a proportional solenoid valve, controlled by the electronic control unit (ECU), which can control the amount of oil entering the high-pressure fuel pump, thereby controlling the oil pressure in the common rail pipe. The good work of this component can not only ensure that the vehicle can run normally but also enable the engine to run in the most fuel-efficient state to achieve the effect of saving fuel