LMM contaminated - And how can it be prevented?

Hello.
The mass airflow sensor was replaced in my car after 95,000 km. Total cost: €312, including VAT.
Troubleshooting and measurement of the mass airflow sensor.
Can I reduce the amount of contamination of the LMM in the future?
Would cleaning the mass airflow sensor every 10,000 km be worthwhile to prevent premature failure?
Can a different air filter help?
Is the hose that goes into the air filter housing at the back also responsible for causing contamination?

Who knows what?

Best, Alex.

Hello,

In my opinion, we need to distinguish between three types of LMM (Laminar Mass Flow Meter) defects.
- Electrical defects in the mass airflow sensor (MAF sensor).
- Low readings due to contamination from oil mist coming from the intake manifold.
- Low readings due to contamination caused by poor air filtration.

Regarding the first two items, there's not much you can do, except perhaps try cleaning the second one. However, I would only do that if the performance noticeably deteriorates, as there is a risk of damaging the mass airflow sensor (MAF sensor) during cleaning.
For the third one, you should use an air filter that truly lives up to its name, and make sure that no air is being sucked in around the filter.
In my opinion, preventative cleaning is not worth the effort.
At least in my A3, the air filter replacement interval is very generous, which, when driving in the rain, leads to a more pronounced "coffee filter effect":
-> All the finest dirt and grime are sucked away. Replacing the air filter every 20,000 km is therefore not a bad idea. Of course, it largely depends on the conditions of use; someone who frequently drives on gravel roads, like me, will naturally have more dirt in the air filter box than someone who only drives on the highway.

Best regards, Rainer.

4. Defect type:

Mechanical destruction caused by vibrations.

Antidote:

Unfortunately, none are known .