The topic of discussion pertains to aftermarket air filters.

[Treeri]

I am contemplating the replacement of the factory air filter in my 2016 B58 340i with an MST air filter. According to existing literature, it has been observed that the use of aftermarket filters may potentially result in the malfunctioning of the Mass Air Flow (MAF) sensor, leading to the generation of a fault code. Does anybody have any firsthand knowledge with the veracity of this claim? At now, I am using the stage 1 Bootmod3 map and contemplating the installation of a downpipe upgrade, subsequently enabling the implementation of a stage 2 map. Thank you for your response.
 

[johnnyb44]

I have not had any difficulties with them; but, it has been a couple of years since I last engaged in their use.
It is possible that the use of oil on the components in question may lead to potential issues with the mass air flow (MAF) sensor, however I cannot assert this with complete certainty.

[ElectricEclipse]

I have installed the MST kit on my device, and the auditory output is quite impressive. The turbocharger has been in operation for a duration of about two years, during which no malfunctions or fault codes have been encountered. The only discernible outcome has been the production of a more pleasant turbo sound.

[johnnyb44]

The problem comes when the consumer regenerates the product and excessively adds oil.

[ElectricEclipse]

The matter at hand is indeed the subject of concern.

[Gianni682]

There are several movies available on YouTube that showcase power runs conducted with various air filters. However, it is important to note that these films often demonstrate that investing in different air filters is mostly futile and does not provide any discernible performance enhancements. Moreover, there is a potential risk of causing long-term damage to the turbo compressor wheel and engine as a result of using such filters.

[Gianni682]

[motorman3]

While it is acknowledged that the aforementioned elements, such as the inclusion of a phony turbo whistle sound and the use of an M3 badge, are well-known, the focus is mostly on the concept or notion being conveyed.

[motorman3]

It is worth noting that BMW invests a significant amount of time and financial resources towards enhancing the auditory experience of its vehicles.
The 325TI vehicle I previously had was equipped with a sound generator located under the engine hood and connected to the ECU compartment.
The ECU compartment functions as a sound amplifier, as shown by the effect of drilling a huge hole underneath the air filter box to produce a resonant roaring sound.

[ElectricEclipse]

It is important to bear in mind.Apply a thin layer of oil.and remove any surplus material.

[NAVITEL]

Over the course of the weekend, I participated in a Bosch training program focused on sensors. During the training, I had the opportunity to see and document the effects of using oiled filters or aftermarket "high performance" filters on the Mass Airflow Sensors (MAF). This was accomplished by capturing images of the MAFs under a microscope, which clearly revealed the detrimental impact of such filters on the MAF functionality.
The absence of issues experienced by an individual does not always imply the absence of damage or the erroneous functioning of the Mass Airflow (MAF) sensor.

Each instance in which I acquire an automobile equipped with an oil filter, I promptly dispose of such filter in a waste receptacle.

As previously mentioned by others, there are web films that provide evidence to support the claim that they do not enhance power.

[diablos_carcv5]

https://www.nicoclub.com/archives/kn-vs-oem-filter.html

I concur.