Air mass meters in all of us?

Hello forum!
Since I am almost sure that my air mass meter is a defect, I would like to know if someone has changed theirs before (or. and whether the desired effect has occurred?
This part costs 373 euros and I would like to spend it only if it has a chance of success.


The LMM is most likely defect because my car makes at times speed jumps in empty run (approx. +/- 200 rpm) and because torque is missing (maximum 368 instead of 410Nm) and because in the power chart zw. 4700 and 4900 rpm is a torque failure of 50 Nm.
It is an S8 4.2 with Mkb. AKH and 250 KW.
I found that all three of the above symptoms indicate a defective LMM. And I've read that after 30,000 km, the things don't do exactly what they should do - so it's quite obvious that my after 160000 km doesn't work so well anymore.


For those interested in the topic:
Here's the info I collected.

This problem actually has every car since an estimated year 1994-1996, because the LMMs were often installed from there. The LMM provides essential information for the mixture preparation and, when aged, always measures too low an air mass. This results in less fuel injected and therefore in lower flow and lower torque, and unround idle and, for diesel, often in shaft-shaped passage. With petrol engines, either the final speed can decrease or this remains approximately normal but the pull force decreases. Torque and power decrease over time, and nothing is in the fault memory. The LMMs break through the bench in all vehicles, especially quickly when water mist enters the intake tract in the rain and when K&N air filters are used (or others are soaked with oil), but even the original air stream fed through the crankcase ventilation contains oil mist, and all this is set on the heat wire respectively. damaged this one.
Supposedly, most LMMs are already ready for exchange after 30,000 km. Cleaning a little but not much. If you googelt after "clean air mass meters" you will also find test bench diagrams, which show a defective, a cleaned and then a new LMM. I also recommend this article: http://www.hopa-tec.de/site/pdf/lmm.pdf
As well as a forum contribution from the dieselschraubercommunitiy forum:

(It's for another engine and another car, but it's almost everyone)
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"Here is the internal info of the friendly, the problem and the solution is known for a while (see last lines).

AKN/AFB engine, TDI V6
Gradual engine power decreasing over mileage.
No error stored in the motor control unit.
___________________________________________________________
Cause: Oil mist can gradually hit the sensor membrane with a standing motor
==References== The air mass meter signal is increasingly distorted until
to appreciable loss of performance. Due to the slow change mostly
no error entry.
- No, no, no! Series : Failure of the reheating phase of the air mass meter.
- No, no, no! From 11.99, Fg. No. 4B YN 057 350
KD: Check air mass meters. The target and actual values of the air intakes
mass in the measurement block 10 analog repair guide under load
The Commission's
Replace air mass meters when the setpoint values are not reached.
ET only delivers parts to the latest standards. Air filter element over-
- Check.
- No, no, no! In addition, the air mass meter is again contaminated.
- No, no, no! the following action. (Only vehicles before Fg. No. above)
- No, no, no! 1. Purge contact from PIN 2 of the air mass meter, the contact
- No, no, no! Cut and isolate. Pin numbering is on the plug.
- No, no, no! 2. New cable (cross section 1 sqm) with 2.8 mm gold contact and
- No, no, no! A single wire sealing of PIN 2 of the air mass meter for central
- No, no, no! electric fuse 31 (output) pull. Cable additionally in iso-
- No, no, no! - I'm going to go in. - Yeah. Run the cable analogous to the motor cable
- No, no, no! treees and then through the water box and the e-box.
- No, no, no! 3. Review of the modification carried out.
- No, no, no! - voltmeters on PIN 2 (new cable) and PIN 3 (mass) of the air
- No, no, no! Connect the meter.
- No, no, no! - Start engine: The voltmeter must be on board voltage (circa 12-14
- No, no, no! V.).
- No, no, no! - Turn off the ignition. The voltage shall be immediately after the engine has been shut down.
- No, no, no! was down to 0 volts.
- No, no, no! Note:
- No, no, no! For vehicles before Fg. No. the air mass meter will still
- No, no, no! For about 4 minutes after the engine has been switched off, it is powered by a voltage.
- No, no, no! During this "reheating phase" of 4 minutes, the previously named
- No, no, no! Burn oil coal on the membrane of the air filter. With the new
- No, no, no! the air mass meter is immediately switched off after the
- No, no, no! Ignition voltageless.
First edition : 18.08.99/ma
last amendment: 10.10.01/ma'
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Greetings, Vincent