Replace Bosch MAF sensor with Hitachi MAF sensor? (V6 TDi AFB)

Hello everyone,

Since I, like perhaps many others here, constantly suffer from defective Bosch mass airflow sensors (the V6 TDI seems to be a real problem child in this regard), I want to replace the old Bosch sensor with a Hitachi mass airflow sensor.

I've already built an adapter plug for this, and I also happened to come across a mass airflow sensor (MAF) from Hitachi.
However, a characteristic curve measurement revealed that the mass airflow sensor (MAF) is likely defective; the maximum... 'The air mass is reading 730mg/stroke; I can confirm this subjectively. The vehicle runs, but it feels a bit sluggish in the low end and very smooth in the high end.'

Comparison measurements with a Bosch mass airflow sensor that was classified as defective showed, subjectively, the same driving feel, and objectively, very similar values and measurement curves.
A 'new' LMM (likely referring to a mass airflow sensor) produces values up to 960mg/R at 3500 RPM and full throttle.

Therefore, (for the time being), the evidence has been provided that the Hitachi LMM can replace the Bosch unit.
What I'm still missing is confirmation that my idea is viable, or even someone who has already successfully completed a similar conversion!
Apparently, Hitachi appliances are supposed to be very durable? And unlike those awful Bosch things, they rarely break.
Can anyone confirm this?

I just want to save the 87 euros if the Hitachi LMM is absolutely unsuitable as a replacement for the Bosch.

By the way, the Hitachi system is factory-installed in vehicles operated by AKE, BAU, AYM, BCZ, and BFC.

I would greatly appreciate any feedback you may have.

Stefan.

Okay,

Although I haven't received any answers yet, I've obtained a new LMM (as a replacement) and I plan to install it this weekend and take measurements again.

If, unexpectedly, there is still interest in another report in this forum, I would be happy to post it here.

Stefan.

Hi, yes, there is definitely interest in a testimonial .

Please send more information ... especially the values up to 960mg/R for AFB are of interest to me (I can only achieve a maximum of 820 with 2 new LMMs).

Regards,
Dieter.

Are there any news?

Hello,

960mg for a V6 engine?
I honestly can't believe that; 820 seems much more realistic to me.
Can a V6 TDI engine actually reach 960mg? It sounds more like a 4-cylinder engine to me.
By the way, I've now had it for 1 1/2 years. I can't complain about the performance, even with 780mg. VW states a value of >750mg. It's also questionable whether 960 mg will actually benefit you without any tuning, or if it's just excess air.
The fact that the characteristic curve is different on the Hitachi device has been described somewhere before.

960mg for a V6 engine?
I honestly can't believe that; 820 seems much more realistic to me.
Can a V6 TDI engine actually reach 960mg? It sounds more like a 4-cylinder engine to me.


1009 with a diode! However, I have no idea to what extent the system actually uses these values. However, there is noticeably more pressure compared to a new LLM.