The BMW e82 118d coupe was manufactured in 2010. The switch located below the hood continues to function even after I have shut off the automobile.

[drummer]

The switch located below the hood on the left side of the engine block continues to function even after I have shut off the automobile.

Can someone identify the specific component in question and determine if it should continue to function?
The movement of the object produces a shrill or high-pitched sound.

Thank you in advance.

[IrvesBMW]

The issue is with the turbo Variable Nozzle Turbine (VNT) actuator. When you mention that it continues moving, does it do so continuously or does it do a repetitive sweeping motion up and down?

[drummer]

Greetings, friend. The object undergoes a sweeping motion, transitioning from one position to another, and then returning to its initial position, with a duration of around 1-2 seconds. The noise produced is of a high frequency on both occasions. This sequence occurs at a frequency of about once every 25-30 seconds.

[IrvesBMW]

That is incorrect. The first step is to do a scan using specialised software designed for BMW vehicles.
Your battery will see significant use.

[drummer]

Thank you, I much appreciate it.👍🏻👍🏻

[VWDaveBMW]

That is rather peculiar.
However, Johnny emphasised the need of doing a code scan as the first step.

[drummer]

I have just installed a new battery, crankshaft pulley, and alternator. Since I acquired the vehicle, it has consistently produced a noise when the bonnet is open and while I am refilling the windscreen reservoir. However, recently I have observed that the noise persists for a much longer duration after I have turned off the car.