Turbo Actuator Electronic 6NW010430-12 Turbochrager Wastegate for BMW 1 2 3 4 5 X3 X4 2.0 150/163/190 HP B47OL B47 D20 819976. Materials: The turbocharger actuator is made of metal and plastic, making it wear-resistant, durable, stable, and shock-resistant, capable of withstanding the harsh conditions of daily use. Function: The main function of the turbocharger actuator is to control and limit the boost pressure of the turbocharger to prevent engine damage and optimize power output. It increases engine power and improves fuel economy. This allows for more efficient fuel combustion, thus improving fuel efficiency. This product is designed to standard specifications and can directly replace old or damaged parts without any modification or adjustment.